<?xml version="1.0" encoding="US-ASCII"?>
<!--XBRL Document Created with Wdesk from Workiva-->
<!-- -->
<xsd:schema attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://www.pentair.com/20181231" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" xmlns:num="http://www.xbrl.org/dtr/type/numeric" xmlns:pnr="http://www.pentair.com/20181231" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <xsd:import namespace="http://fasb.org/srt/2018-01-31" schemaLocation="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd" />
  <xsd:import namespace="http://fasb.org/us-gaap/2018-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd" />
  <xsd:import namespace="http://fasb.org/us-roles/2018-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2018/elts/us-roles-2018-01-31.xsd" />
  <xsd:import namespace="http://fasb.org/us-types/2018-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2018/elts/us-types-2018-01-31.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2009/arcrole/fact-explanatoryFact" schemaLocation="http://www.xbrl.org/lrr/arcrole/factExplanatory-2009-12-16.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2009/role/negated" schemaLocation="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2009/role/net" schemaLocation="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd" />
  <xsd:import namespace="http://www.xbrl.org/dtr/type/non-numeric" schemaLocation="http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd" />
  <xsd:import namespace="http://www.xbrl.org/dtr/type/numeric" schemaLocation="http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd" />
  <xsd:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/country/2017-01-31" schemaLocation="http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/currency/2017-01-31" schemaLocation="http://xbrl.sec.gov/currency/2017/currency-2017-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/dei/2018-01-31" schemaLocation="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/exch/2018-01-31" schemaLocation="https://xbrl.sec.gov/exch/2018/exch-2018-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/invest/2013-01-31" schemaLocation="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/naics/2017-01-31" schemaLocation="http://xbrl.sec.gov/naics/2017/naics-2017-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/sic/2011-01-31" schemaLocation="http://xbrl.sec.gov/sic/2011/sic-2011-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/stpr/2018-01-31" schemaLocation="https://xbrl.sec.gov/stpr/2018/stpr-2018-01-31.xsd" />
  <xsd:annotation>
    <xsd:appinfo>
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="pnr-20181231_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="pnr-20181231_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="pnr-20181231_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="pnr-20181231_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:type="simple" />
      <link:roleType id="AccumulatedOtherComprehensiveIncomeLoss" roleURI="http://www.pentair.com/role/AccumulatedOtherComprehensiveIncomeLoss">
        <link:definition>2118100 - Disclosure - Accumulated Other Comprehensive Income (Loss)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AccumulatedOtherComprehensiveIncomeLossComponentsOfAociDetail" roleURI="http://www.pentair.com/role/AccumulatedOtherComprehensiveIncomeLossComponentsOfAociDetail">
        <link:definition>2418402 - Disclosure - Accumulated Other Comprehensive Income (Loss) - Components of AOCI (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AccumulatedOtherComprehensiveIncomeLossTables" roleURI="http://www.pentair.com/role/AccumulatedOtherComprehensiveIncomeLossTables">
        <link:definition>2318301 - Disclosure - Accumulated Other Comprehensive Income (Loss) (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AcquisitionsAndDiscontinuedOperations" roleURI="http://www.pentair.com/role/AcquisitionsAndDiscontinuedOperations">
        <link:definition>2108100 - Disclosure - Acquisitions and Discontinued Operations</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AcquisitionsAndDiscontinuedOperationsAcquisitionsDetails" roleURI="http://www.pentair.com/role/AcquisitionsAndDiscontinuedOperationsAcquisitionsDetails">
        <link:definition>2408402 - Disclosure - Acquisitions and Discontinued Operations - Acquisitions (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AcquisitionsAndDiscontinuedOperationsComponentsOfDiscontinuedOperationsDetails" roleURI="http://www.pentair.com/role/AcquisitionsAndDiscontinuedOperationsComponentsOfDiscontinuedOperationsDetails">
        <link:definition>2408404 - Disclosure - Acquisitions and Discontinued Operations - Components of Discontinued Operations (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AcquisitionsAndDiscontinuedOperationsDiscontinuedOperationsDetails" roleURI="http://www.pentair.com/role/AcquisitionsAndDiscontinuedOperationsDiscontinuedOperationsDetails">
        <link:definition>2408403 - Disclosure - Acquisitions and Discontinued Operations - Discontinued Operations (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AcquisitionsAndDiscontinuedOperationsTables" roleURI="http://www.pentair.com/role/AcquisitionsAndDiscontinuedOperationsTables">
        <link:definition>2308301 - Disclosure - Acquisitions and Discontinued Operations (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BasisOfPresentationAndSummaryOfSignificantAccountingPolicies" roleURI="http://www.pentair.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPolicies">
        <link:definition>2101100 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesBasisOfPresentationDetails" roleURI="http://www.pentair.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesBasisOfPresentationDetails">
        <link:definition>2401403 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies - Basis of Presentation (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesEstimatedUsefulLivesOfPropertyAndEquipmentDetail" roleURI="http://www.pentair.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesEstimatedUsefulLivesOfPropertyAndEquipmentDetail">
        <link:definition>2401409 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies - Estimated Useful Lives of Property and Equipment (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesGoodwillAndIdentifiableIntangibleAssetsDetails" roleURI="http://www.pentair.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesGoodwillAndIdentifiableIntangibleAssetsDetails">
        <link:definition>2401411 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies - Goodwill and identifiable intangible assets (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesInsuranceSubsidiaryDetails" roleURI="http://www.pentair.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesInsuranceSubsidiaryDetails">
        <link:definition>2401412 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies - Insurance Subsidiary (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesNetSalesInformationDetail" roleURI="http://www.pentair.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesNetSalesInformationDetail">
        <link:definition>2401407 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies - Net Sales Information (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesNewAccountingStandardsDetail" roleURI="http://www.pentair.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesNewAccountingStandardsDetail">
        <link:definition>2401413 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies - New Accounting Standards (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesPerformanceObligationsDetail" roleURI="http://www.pentair.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesPerformanceObligationsDetail">
        <link:definition>2401405 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies - Performance Obligations (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesPolicies" roleURI="http://www.pentair.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesPolicies">
        <link:definition>2201201 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies  (Policies)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesPropertyPlantAndEquipmentByGeographicLocationDetail" roleURI="http://www.pentair.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesPropertyPlantAndEquipmentByGeographicLocationDetail">
        <link:definition>2401410 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies - Property, Plant and Equipment by Geographic Location (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesResearchAndDevelopmentDetail" roleURI="http://www.pentair.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesResearchAndDevelopmentDetail">
        <link:definition>2401408 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies - Research and Development (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesRevenueAdditionalInformationDetail" roleURI="http://www.pentair.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesRevenueAdditionalInformationDetail">
        <link:definition>2401404 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies - Revenue, Additional Information (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesScheduleOfContractAssetsAndLiabilitiesDetail" roleURI="http://www.pentair.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesScheduleOfContractAssetsAndLiabilitiesDetail">
        <link:definition>2401406 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies - Schedule of Contract Assets and Liabilities (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesScheduleOfImpactOfAsusOnCondensedConsolidatedBalanceSheetsDetail" roleURI="http://www.pentair.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesScheduleOfImpactOfAsusOnCondensedConsolidatedBalanceSheetsDetail">
        <link:definition>2401414 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies - Schedule of Impact of ASUs on the Condensed Consolidated Balance Sheets (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTables" roleURI="http://www.pentair.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTables">
        <link:definition>2301302 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies  (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BenefitPlans" roleURI="http://www.pentair.com/role/BenefitPlans">
        <link:definition>2132100 - Disclosure - Benefit Plans</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BenefitPlansActualOverallAssetAllocationForUSAndNonUSPlansAsComparedToInvestmentPolicyGoalsDetail" roleURI="http://www.pentair.com/role/BenefitPlansActualOverallAssetAllocationForUSAndNonUSPlansAsComparedToInvestmentPolicyGoalsDetail">
        <link:definition>2432411 - Disclosure - Benefit Plans - Actual Overall Asset Allocation for U.S. And Non-U.S. Plans as Compared to Investment Policy Goals (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BenefitPlansAmountsRecordedInConsolidatedBalanceSheetsDetail" roleURI="http://www.pentair.com/role/BenefitPlansAmountsRecordedInConsolidatedBalanceSheetsDetail">
        <link:definition>2432404 - Disclosure - Benefit Plans - Amounts Recorded in Consolidated Balance Sheets (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BenefitPlansAssumedHealthCareCostTrendRatesDetail" roleURI="http://www.pentair.com/role/BenefitPlansAssumedHealthCareCostTrendRatesDetail">
        <link:definition>2432409 - Disclosure - Benefit Plans - Assumed Health Care Cost Trend Rates (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BenefitPlansCashFlowsContributionsDetails" roleURI="http://www.pentair.com/role/BenefitPlansCashFlowsContributionsDetails">
        <link:definition>2432413 - Disclosure - Benefit Plans - Cash Flows, Contributions (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BenefitPlansComponentsOfNetPeriodicBenefitCostDetail" roleURI="http://www.pentair.com/role/BenefitPlansComponentsOfNetPeriodicBenefitCostDetail">
        <link:definition>2432406 - Disclosure - Benefit Plans - Components of Net Periodic Benefit Cost (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BenefitPlansEffectOfOnePercentagePointChangeInAssumedHealthcareCostTrendRatesDetail" roleURI="http://www.pentair.com/role/BenefitPlansEffectOfOnePercentagePointChangeInAssumedHealthcareCostTrendRatesDetail">
        <link:definition>2432410 - Disclosure - Benefit Plans - Effect of One-Percentage-Point Change in Assumed Healthcare Cost Trend Rates (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BenefitPlansEstimatedFutureBenefitPaymentsDetail" roleURI="http://www.pentair.com/role/BenefitPlansEstimatedFutureBenefitPaymentsDetail">
        <link:definition>2432414 - Disclosure - Benefit Plans - Estimated future benefit payments (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BenefitPlansExpectedRatesOfReturnDetails" roleURI="http://www.pentair.com/role/BenefitPlansExpectedRatesOfReturnDetails">
        <link:definition>2432408 - Disclosure - Benefit Plans - Expected Rates of Return (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BenefitPlansObligationsAndFundedStatusDetail" roleURI="http://www.pentair.com/role/BenefitPlansObligationsAndFundedStatusDetail">
        <link:definition>2432403 - Disclosure - Benefit Plans - Obligations and Funded Status (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BenefitPlansPensionAndOtherPostRetirementPlansDetails" roleURI="http://www.pentair.com/role/BenefitPlansPensionAndOtherPostRetirementPlansDetails">
        <link:definition>2432402 - Disclosure - Benefit Plans - Pension and Other Post-retirement Plans (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BenefitPlansPensionPlansWithAccumulatedBenefitObligationOrProjectedBenefitObligationInExcessOfPlanAssetsDetail" roleURI="http://www.pentair.com/role/BenefitPlansPensionPlansWithAccumulatedBenefitObligationOrProjectedBenefitObligationInExcessOfPlanAssetsDetail">
        <link:definition>2432405 - Disclosure - Benefit Plans - Pension Plans with Accumulated Benefit Obligation or Projected Benefit Obligation in Excess of Plan Assets (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BenefitPlansPlanAssetsUsingFairValueMethodologiesDetail" roleURI="http://www.pentair.com/role/BenefitPlansPlanAssetsUsingFairValueMethodologiesDetail">
        <link:definition>2432412 - Disclosure - Benefit Plans - Plan Assets Using Fair Value Methodologies (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BenefitPlansSavingsPlanDetails" roleURI="http://www.pentair.com/role/BenefitPlansSavingsPlanDetails">
        <link:definition>2432415 - Disclosure - Benefit Plans - Savings Plan (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BenefitPlansScheduleOfAssumptionsDetail" roleURI="http://www.pentair.com/role/BenefitPlansScheduleOfAssumptionsDetail">
        <link:definition>2432407 - Disclosure - Benefit Plans - Schedule of Assumptions (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BenefitPlansTables" roleURI="http://www.pentair.com/role/BenefitPlansTables">
        <link:definition>2332301 - Disclosure - Benefit Plans (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsAndContingencies" roleURI="http://www.pentair.com/role/CommitmentsAndContingencies">
        <link:definition>2152100 - Disclosure - Commitments and Contingencies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsAndContingenciesAdditionalInformationDetail" roleURI="http://www.pentair.com/role/CommitmentsAndContingenciesAdditionalInformationDetail">
        <link:definition>2452402 - Disclosure - Commitments and Contingencies - Additional Information (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsAndContingenciesFutureMinimumLeaseCommitmentsUnderNonCancelableOperatingLeasesDetail" roleURI="http://www.pentair.com/role/CommitmentsAndContingenciesFutureMinimumLeaseCommitmentsUnderNonCancelableOperatingLeasesDetail">
        <link:definition>2452404 - Disclosure - Commitments and Contingencies - Future Minimum Lease Commitments Under Non-Cancelable Operating Leases (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsAndContingenciesNetRentalExpenseUnderOperatingLeasesDetail" roleURI="http://www.pentair.com/role/CommitmentsAndContingenciesNetRentalExpenseUnderOperatingLeasesDetail">
        <link:definition>2452403 - Disclosure - Commitments and Contingencies - Net Rental Expense Under Operating Leases (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsAndContingenciesTables" roleURI="http://www.pentair.com/role/CommitmentsAndContingenciesTables">
        <link:definition>2352301 - Disclosure - Commitments and Contingencies (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsAndContingenciesWarrantyReserveRollforwardDetail" roleURI="http://www.pentair.com/role/CommitmentsAndContingenciesWarrantyReserveRollforwardDetail">
        <link:definition>2452405 - Disclosure - Commitments and Contingencies - Warranty Reserve Rollforward (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedBalanceSheets" roleURI="http://www.pentair.com/role/ConsolidatedBalanceSheets">
        <link:definition>1002000 - Statement - Consolidated Balance Sheets</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedBalanceSheetsParenthetical" roleURI="http://www.pentair.com/role/ConsolidatedBalanceSheetsParenthetical">
        <link:definition>1002501 - Statement - Consolidated Balance Sheets (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementsOfCashFlows" roleURI="http://www.pentair.com/role/ConsolidatedStatementsOfCashFlows">
        <link:definition>1003000 - Statement - Consolidated Statements Of Cash Flows</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementsOfChangesInEquity" roleURI="http://www.pentair.com/role/ConsolidatedStatementsOfChangesInEquity">
        <link:definition>1004000 - Statement - Consolidated Statements Of Changes In Equity</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementsOfOperationsAndComprehensiveIncomeLoss" roleURI="http://www.pentair.com/role/ConsolidatedStatementsOfOperationsAndComprehensiveIncomeLoss">
        <link:definition>1001000 - Statement - Consolidated Statements Of Operations And Comprehensive Income (Loss)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementsOfOperationsAndComprehensiveIncomeLossParenthetical" roleURI="http://www.pentair.com/role/ConsolidatedStatementsOfOperationsAndComprehensiveIncomeLossParenthetical">
        <link:definition>1001001 - Statement - Consolidated Statements Of Operations And Comprehensive Income (Loss)  (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Debt" roleURI="http://www.pentair.com/role/Debt">
        <link:definition>2121100 - Disclosure - Debt</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtAdditionalInformationDetails" roleURI="http://www.pentair.com/role/DebtAdditionalInformationDetails">
        <link:definition>2421404 - Disclosure - Debt - Additional Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtDebtOutstandingAmountsMaturingDetail" roleURI="http://www.pentair.com/role/DebtDebtOutstandingAmountsMaturingDetail">
        <link:definition>2421403 - Disclosure - Debt - Debt Outstanding Amounts Maturing (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtDebtOutstandingAndAverageInterestRatesDetail" roleURI="http://www.pentair.com/role/DebtDebtOutstandingAndAverageInterestRatesDetail">
        <link:definition>2421402 - Disclosure - Debt - Debt Outstanding and Average Interest Rates (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtTables" roleURI="http://www.pentair.com/role/DebtTables">
        <link:definition>2321301 - Disclosure - Debt (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DerivativesAndFinancialInstruments" roleURI="http://www.pentair.com/role/DerivativesAndFinancialInstruments">
        <link:definition>2122100 - Disclosure - Derivatives and Financial Instruments</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DerivativesAndFinancialInstrumentsAdditionalInformationDetail" roleURI="http://www.pentair.com/role/DerivativesAndFinancialInstrumentsAdditionalInformationDetail">
        <link:definition>2422402 - Disclosure - Derivatives and Financial Instruments - Additional Information (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DerivativesAndFinancialInstrumentsAssetsAndLiabilitiesMeasuredAtFairValueAdditionalInformationDetail" roleURI="http://www.pentair.com/role/DerivativesAndFinancialInstrumentsAssetsAndLiabilitiesMeasuredAtFairValueAdditionalInformationDetail">
        <link:definition>2422405 - Disclosure - Derivatives and Financial Instruments - Assets and Liabilities Measured at Fair Value Additional Information (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DerivativesAndFinancialInstrumentsAssetsAndLiabilitiesMeasuredAtFairValueDetail" roleURI="http://www.pentair.com/role/DerivativesAndFinancialInstrumentsAssetsAndLiabilitiesMeasuredAtFairValueDetail">
        <link:definition>2422404 - Disclosure - Derivatives and Financial Instruments - Assets and Liabilities Measured at Fair Value (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DerivativesAndFinancialInstrumentsRecordedAmountsAndEstimatedFairValuesOfLongTermDebtAndDerivativeFinancialInstrumentsDetail" roleURI="http://www.pentair.com/role/DerivativesAndFinancialInstrumentsRecordedAmountsAndEstimatedFairValuesOfLongTermDebtAndDerivativeFinancialInstrumentsDetail">
        <link:definition>2422403 - Disclosure - Derivatives and Financial Instruments - Recorded Amounts and Estimated Fair Values of Long-term Debt and Derivative Financial Instruments (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DerivativesAndFinancialInstrumentsTables" roleURI="http://www.pentair.com/role/DerivativesAndFinancialInstrumentsTables">
        <link:definition>2322301 - Disclosure - Derivatives and Financial Instruments (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DocumentAndEntityInformation" roleURI="http://www.pentair.com/role/DocumentAndEntityInformation">
        <link:definition>0001000 - Document - Document and Entity Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EarningsLossPerShare" roleURI="http://www.pentair.com/role/EarningsLossPerShare">
        <link:definition>2110100 - Disclosure - Earnings (Loss) Per Share</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EarningsLossPerShareAdditionalInformationDetail" roleURI="http://www.pentair.com/role/EarningsLossPerShareAdditionalInformationDetail">
        <link:definition>2410402 - Disclosure - Earnings (Loss) Per Share - Additional Information (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EarningsLossPerShareTables" roleURI="http://www.pentair.com/role/EarningsLossPerShareTables">
        <link:definition>2310301 - Disclosure - Earnings (Loss) Per Share (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillAndOtherIdentifiableIntangibleAssets" roleURI="http://www.pentair.com/role/GoodwillAndOtherIdentifiableIntangibleAssets">
        <link:definition>2114100 - Disclosure - Goodwill and Other Identifiable Intangible Assets</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillAndOtherIdentifiableIntangibleAssetsAdditionalInformationDetail" roleURI="http://www.pentair.com/role/GoodwillAndOtherIdentifiableIntangibleAssetsAdditionalInformationDetail">
        <link:definition>2414402 - Disclosure - Goodwill and Other Identifiable Intangible Assets - Additional Information (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillAndOtherIdentifiableIntangibleAssetsChangesInCarryingAmountOfGoodwillBySegmentDetail" roleURI="http://www.pentair.com/role/GoodwillAndOtherIdentifiableIntangibleAssetsChangesInCarryingAmountOfGoodwillBySegmentDetail">
        <link:definition>2414403 - Disclosure - Goodwill and Other Identifiable Intangible Assets - Changes in Carrying Amount of Goodwill by Segment (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillAndOtherIdentifiableIntangibleAssetsEstimatedFutureAmortizationExpenseForIdentifiableIntangibleAssetsDetail" roleURI="http://www.pentair.com/role/GoodwillAndOtherIdentifiableIntangibleAssetsEstimatedFutureAmortizationExpenseForIdentifiableIntangibleAssetsDetail">
        <link:definition>2414405 - Disclosure - Goodwill and Other Identifiable Intangible Assets - Estimated Future Amortization Expense for Identifiable Intangible Assets (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillAndOtherIdentifiableIntangibleAssetsIdentifiableIntangibleAssetsDetail" roleURI="http://www.pentair.com/role/GoodwillAndOtherIdentifiableIntangibleAssetsIdentifiableIntangibleAssetsDetail">
        <link:definition>2414404 - Disclosure - Goodwill and Other Identifiable Intangible Assets - Identifiable Intangible Assets (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillAndOtherIdentifiableIntangibleAssetsTables" roleURI="http://www.pentair.com/role/GoodwillAndOtherIdentifiableIntangibleAssetsTables">
        <link:definition>2314301 - Disclosure - Goodwill and Other Identifiable Intangible Assets (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxes" roleURI="http://www.pentair.com/role/IncomeTaxes">
        <link:definition>2127100 - Disclosure - Income Taxes</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesAdditionalInformationDetail" roleURI="http://www.pentair.com/role/IncomeTaxesAdditionalInformationDetail">
        <link:definition>2427407 - Disclosure - Income Taxes - Additional Information (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesDeferredTaxAssetsAndLiabilitiesDetail" roleURI="http://www.pentair.com/role/IncomeTaxesDeferredTaxAssetsAndLiabilitiesDetail">
        <link:definition>2427409 - Disclosure - Income Taxes - Deferred Tax Assets and Liabilities (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesDeferredTaxesDetail" roleURI="http://www.pentair.com/role/IncomeTaxesDeferredTaxesDetail">
        <link:definition>2427408 - Disclosure - Income Taxes - Deferred Taxes (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesIncomeLossBeforeIncomeTaxesAndNoncontrollingInterestDetail" roleURI="http://www.pentair.com/role/IncomeTaxesIncomeLossBeforeIncomeTaxesAndNoncontrollingInterestDetail">
        <link:definition>2427402 - Disclosure - Income Taxes - Income (Loss) Before Income Taxes and Noncontrolling Interest (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesProvisionForIncomeTaxesDetail" roleURI="http://www.pentair.com/role/IncomeTaxesProvisionForIncomeTaxesDetail">
        <link:definition>2427403 - Disclosure - Income Taxes - Provision for Income Taxes (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesReconciliationOfFederalStatutoryIncomeTaxRateToEffectiveTaxRateAdditionalInformationDetail" roleURI="http://www.pentair.com/role/IncomeTaxesReconciliationOfFederalStatutoryIncomeTaxRateToEffectiveTaxRateAdditionalInformationDetail">
        <link:definition>2427405 - Disclosure - Income Taxes - Reconciliation of Federal Statutory Income Tax Rate to Effective Tax Rate Additional Information (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesReconciliationOfFederalStatutoryIncomeTaxRateToEffectiveTaxRateDetail" roleURI="http://www.pentair.com/role/IncomeTaxesReconciliationOfFederalStatutoryIncomeTaxRateToEffectiveTaxRateDetail">
        <link:definition>2427404 - Disclosure - Income Taxes - Reconciliation of Federal Statutory Income Tax Rate to Effective Tax Rate (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesReconciliationsOfGrossUnrecognizedTaxBenefitsDetail" roleURI="http://www.pentair.com/role/IncomeTaxesReconciliationsOfGrossUnrecognizedTaxBenefitsDetail">
        <link:definition>2427406 - Disclosure - Income Taxes - Reconciliations of Gross Unrecognized Tax Benefits (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesTables" roleURI="http://www.pentair.com/role/IncomeTaxesTables">
        <link:definition>2327301 - Disclosure - Income Taxes (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Restructuring" roleURI="http://www.pentair.com/role/Restructuring">
        <link:definition>2112100 - Disclosure - Restructuring</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RestructuringAccrualActivityRecordedOnCondensedConsolidatedBalanceSheetsDetail" roleURI="http://www.pentair.com/role/RestructuringAccrualActivityRecordedOnCondensedConsolidatedBalanceSheetsDetail">
        <link:definition>2412404 - Disclosure - Restructuring - Accrual Activity recorded on Condensed Consolidated Balance Sheets (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RestructuringAdditionalInformationDetail" roleURI="http://www.pentair.com/role/RestructuringAdditionalInformationDetail">
        <link:definition>2412402 - Disclosure - Restructuring - Additional Information (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RestructuringCostsIncludedInSellingGeneralAdministrativeExpensesOnConsolidatedStatementsOfIncomeDetail" roleURI="http://www.pentair.com/role/RestructuringCostsIncludedInSellingGeneralAdministrativeExpensesOnConsolidatedStatementsOfIncomeDetail">
        <link:definition>2412403 - Disclosure - Restructuring - Costs Included in Selling, General &amp; Administrative expenses on Consolidated Statements of Income (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RestructuringRestructuringCostsBySegmentDetails" roleURI="http://www.pentair.com/role/RestructuringRestructuringCostsBySegmentDetails">
        <link:definition>2412405 - Disclosure - Restructuring - Restructuring Costs by Segment (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RestructuringTables" roleURI="http://www.pentair.com/role/RestructuringTables">
        <link:definition>2312301 - Disclosure - Restructuring (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ScheduleIiValuationAndQualifyingAccounts" roleURI="http://www.pentair.com/role/ScheduleIiValuationAndQualifyingAccounts">
        <link:definition>2171100 - Disclosure - Schedule II - Valuation and Qualifying Accounts</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ScheduleIiValuationAndQualifyingAccountsDisclosureTableDetail" roleURI="http://www.pentair.com/role/ScheduleIiValuationAndQualifyingAccountsDisclosureTableDetail">
        <link:definition>2471401 - Disclosure - Schedule II - Valuation and Qualifying Accounts - Disclosure Table (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformation" roleURI="http://www.pentair.com/role/SegmentInformation">
        <link:definition>2149100 - Disclosure - Segment Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformationAdditionalInformationDetail" roleURI="http://www.pentair.com/role/SegmentInformationAdditionalInformationDetail">
        <link:definition>2449403 - Disclosure - Segment Information - Additional Information (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformationFinancialInformationByReportableSegmentDetail" roleURI="http://www.pentair.com/role/SegmentInformationFinancialInformationByReportableSegmentDetail">
        <link:definition>2449402 - Disclosure - Segment Information - Financial Information By Reportable Segment (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformationReconciliationOfIncomeFromContinuingOperationsFromSegmentsToConsolidatedDetails" roleURI="http://www.pentair.com/role/SegmentInformationReconciliationOfIncomeFromContinuingOperationsFromSegmentsToConsolidatedDetails">
        <link:definition>2449404 - Disclosure - Segment Information Reconciliation of Income from Continuing Operations from Segments to Consolidated (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformationTables" roleURI="http://www.pentair.com/role/SegmentInformationTables">
        <link:definition>2349301 - Disclosure - Segment Information (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SelectedQuarterlyDataTables" roleURI="http://www.pentair.com/role/SelectedQuarterlyDataTables">
        <link:definition>2363301 - Disclosure - Selected Quarterly Data (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SelectedQuarterlyDataUnaudited" roleURI="http://www.pentair.com/role/SelectedQuarterlyDataUnaudited">
        <link:definition>2163100 - Disclosure - Selected Quarterly Data (unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SelectedQuarterlyDataUnauditedAdditionalInformationDetail" roleURI="http://www.pentair.com/role/SelectedQuarterlyDataUnauditedAdditionalInformationDetail">
        <link:definition>2463403 - Disclosure - Selected Quarterly Data (unaudited) - Additional Information (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SelectedQuarterlyDataUnauditedQuarterlyFinancialInformationDetail" roleURI="http://www.pentair.com/role/SelectedQuarterlyDataUnauditedQuarterlyFinancialInformationDetail">
        <link:definition>2463402 - Disclosure - Selected Quarterly Data (unaudited) - Quarterly Financial Information (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SharePlans" roleURI="http://www.pentair.com/role/SharePlans">
        <link:definition>2147100 - Disclosure - Share Plans</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SharePlansAdditionalInformationDetail" roleURI="http://www.pentair.com/role/SharePlansAdditionalInformationDetail">
        <link:definition>2447403 - Disclosure - Share Plans - Additional Information (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SharePlansPerformanceStockUnitsDetails" roleURI="http://www.pentair.com/role/SharePlansPerformanceStockUnitsDetails">
        <link:definition>2447407 - Disclosure - Share Plans - Performance Stock units (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SharePlansRestrictedStockUnitsDetail" roleURI="http://www.pentair.com/role/SharePlansRestrictedStockUnitsDetail">
        <link:definition>2447406 - Disclosure - Share Plans - Restricted Stock Units (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SharePlansShareBasedCompensationExpenseDetails" roleURI="http://www.pentair.com/role/SharePlansShareBasedCompensationExpenseDetails">
        <link:definition>2447402 - Disclosure - Share Plans - Share-based compensation expense (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SharePlansStockOptionActivityDetail" roleURI="http://www.pentair.com/role/SharePlansStockOptionActivityDetail">
        <link:definition>2447404 - Disclosure - Share Plans - Stock Option Activity (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SharePlansStockOptionFairValueAssumptionsDetail" roleURI="http://www.pentair.com/role/SharePlansStockOptionFairValueAssumptionsDetail">
        <link:definition>2447405 - Disclosure - Share Plans - Stock Option Fair Value Assumptions (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SharePlansTables" roleURI="http://www.pentair.com/role/SharePlansTables">
        <link:definition>2347301 - Disclosure - Share Plans (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareholdersEquity" roleURI="http://www.pentair.com/role/ShareholdersEquity">
        <link:definition>2145100 - Disclosure - Shareholders' Equity</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareholdersEquityAdditionalInformationDetail" roleURI="http://www.pentair.com/role/ShareholdersEquityAdditionalInformationDetail">
        <link:definition>2445401 - Disclosure - Shareholder's Equity - Additional Information (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SupplementalBalanceSheetInformation" roleURI="http://www.pentair.com/role/SupplementalBalanceSheetInformation">
        <link:definition>2117100 - Disclosure - Supplemental Balance Sheet Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SupplementalBalanceSheetInformationDetail" roleURI="http://www.pentair.com/role/SupplementalBalanceSheetInformationDetail">
        <link:definition>2417402 - Disclosure - Supplemental Balance Sheet Information (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SupplementalBalanceSheetInformationTables" roleURI="http://www.pentair.com/role/SupplementalBalanceSheetInformationTables">
        <link:definition>2317301 - Disclosure - Supplemental Balance Sheet Information (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SupplementalGuarantorInformation" roleURI="http://www.pentair.com/role/SupplementalGuarantorInformation">
        <link:definition>2167100 - Disclosure - Supplemental Guarantor Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SupplementalGuarantorInformationAdditionalInformationDetail" roleURI="http://www.pentair.com/role/SupplementalGuarantorInformationAdditionalInformationDetail">
        <link:definition>2467402 - Disclosure - Supplemental Guarantor Information - Additional Information (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SupplementalGuarantorInformationCondensedConsolidatingBalanceSheetDetail" roleURI="http://www.pentair.com/role/SupplementalGuarantorInformationCondensedConsolidatingBalanceSheetDetail">
        <link:definition>2467404 - Disclosure - Supplemental Guarantor Information - Condensed Consolidating Balance Sheet (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SupplementalGuarantorInformationCondensedConsolidatingStatementOfCashFlowsDetail" roleURI="http://www.pentair.com/role/SupplementalGuarantorInformationCondensedConsolidatingStatementOfCashFlowsDetail">
        <link:definition>2467405 - Disclosure - Supplemental Guarantor Information - Condensed Consolidating Statement of Cash Flows (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SupplementalGuarantorInformationCondensedConsolidatingStatementOfOperationsAndComprehensiveIncomeLossDetail" roleURI="http://www.pentair.com/role/SupplementalGuarantorInformationCondensedConsolidatingStatementOfOperationsAndComprehensiveIncomeLossDetail">
        <link:definition>2467403 - Disclosure - Supplemental Guarantor Information - Condensed Consolidating Statement of Operations and Comprehensive Income (Loss) (Detail)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SupplementalGuarantorInformationTables" roleURI="http://www.pentair.com/role/SupplementalGuarantorInformationTables">
        <link:definition>2367301 - Disclosure - Supplemental Guarantor Information (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </xsd:appinfo>
  </xsd:annotation>
  <xsd:element abstract="true" id="pnr_A401KPlanLegacyGroupOneMember" name="A401KPlanLegacyGroupOneMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_A401KPlanLegacyGroupTwoMember" name="A401KPlanLegacyGroupTwoMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_AcquiredIntangibleAssetsByMajorClassLineItems" name="AcquiredIntangibleAssetsByMajorClassLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_ApprovedNotDeclaredlDividends" name="ApprovedNotDeclaredlDividends" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_AquaticSystemsMember" name="AquaticSystemsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_AquionMember" name="AquionMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_BalanceSheetClassificationOfNetDeferredIncomeTaxAssetsTableTextBlock" name="BalanceSheetClassificationOfNetDeferredIncomeTaxAssetsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_BuildingsAndLeaseholdImprovementsMember" name="BuildingsAndLeaseholdImprovementsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_BusinessCombinationAndDisposalGroupsIncludingDiscontinuedOperationsDisclosureAbstract" name="BusinessCombinationAndDisposalGroupsIncludingDiscontinuedOperationsDisclosureAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_BusinessCombinationAndDisposalGroupsIncludingDiscontinuedOperationsDisclosureTextBlock" name="BusinessCombinationAndDisposalGroupsIncludingDiscontinuedOperationsDisclosureTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_Carryingvalueofintangibleassetsafterimpairment" name="Carryingvalueofintangibleassetsafterimpairment" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="pnr_ChangesinCumulativetranslationadjustmentinclusiveofdivestitureofbusinessreclassifiedtogainfromsale" name="ChangesinCumulativetranslationadjustmentinclusiveofdivestitureofbusinessreclassifiedtogainfromsale" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_CommercialSectorMember" name="CommercialSectorMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_ComputationOfEarningsPerShareLineItems" name="ComputationOfEarningsPerShareLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_ConsolidatedStatementsofComprehensiveIncomeLossParentheticalAbstract" name="ConsolidatedStatementsofComprehensiveIncomeLossParentheticalAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_ContractWithCustomerAssetIncreaseDecreaseAmount" name="ContractWithCustomerAssetIncreaseDecreaseAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_ContractWithCustomerAssetIncreaseDecreaseAmountAbstract" name="ContractWithCustomerAssetIncreaseDecreaseAmountAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_ContractWithCustomerAssetIncreaseDecreasePercent" name="ContractWithCustomerAssetIncreaseDecreasePercent" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_ContractWithCustomerAssetIncreaseDecreasePercentAbstract" name="ContractWithCustomerAssetIncreaseDecreasePercentAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_ContractWithCustomerAssetLiabilityNet" name="ContractWithCustomerAssetLiabilityNet" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="pnr_ContractWithCustomerAssetLiabilityNetIncreaseDecreaseAmount" name="ContractWithCustomerAssetLiabilityNetIncreaseDecreaseAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="pnr_ContractWithCustomerAssetLiabilityNetIncreaseDecreasePercent" name="ContractWithCustomerAssetLiabilityNetIncreaseDecreasePercent" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_ContractWithCustomerLiabilityIncreaseDecreaseAmount" name="ContractWithCustomerLiabilityIncreaseDecreaseAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="pnr_ContractWithCustomerLiabilityIncreaseDecreasePercent" name="ContractWithCustomerLiabilityIncreaseDecreasePercent" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_ContractwithCustomerLiabilityRevenueRecognizedPercent" name="ContractwithCustomerLiabilityRevenueRecognizedPercent" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_Corporateallocations" name="Corporateallocations" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="pnr_Dealrelatedcostsandexpenses" name="Dealrelatedcostsandexpenses" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="pnr_DebtInstrumentCashTenderOffer" name="DebtInstrumentCashTenderOffer" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="pnr_DebtInstrumentCovenantUnrestrictedCash" name="DebtInstrumentCovenantUnrestrictedCash" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="pnr_DebtInstrumentEBITDARatioCovenant" name="DebtInstrumentEBITDARatioCovenant" nillable="true" substitutionGroup="xbrli:item" type="xbrli:pureItemType" xbrli:periodType="instant" />
  <xsd:element id="pnr_DebtInstrumentLeverageRatioCovenant" name="DebtInstrumentLeverageRatioCovenant" nillable="true" substitutionGroup="xbrli:item" type="xbrli:pureItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="pnr_December2014ShareRepurchaseProgramMember" name="December2014ShareRepurchaseProgramMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_December2014ShareRepurchaseProgramMemberDomain" name="December2014ShareRepurchaseProgramMemberDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_DeferredCompensationPlanAssetsFairValueDisclosure" name="DeferredCompensationPlanAssetsFairValueDisclosure" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="pnr_DeferredTaxAssetsAndLiabilitiesLineItems" name="DeferredTaxAssetsAndLiabilitiesLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_DeferredTaxAssetsAndLiabilitiesTable" name="DeferredTaxAssetsAndLiabilitiesTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_DeferredTaxAssetsOperatingLossCarryforwardsAndTaxCreditCarryforwards" name="DeferredTaxAssetsOperatingLossCarryforwardsAndTaxCreditCarryforwards" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="pnr_DeferredTaxAssetsOperatingLossCarryforwardsForeignjurisdictionswithunlimitedtaxlosscarryforwardperiods" name="DeferredTaxAssetsOperatingLossCarryforwardsForeignjurisdictionswithunlimitedtaxlosscarryforwardperiods" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="pnr_DefinedBenefitPlanExpectedFutureBenefitPaymentsAfterYearFive" name="DefinedBenefitPlanExpectedFutureBenefitPaymentsAfterYearFive" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="pnr_DefinedBenefitPlanPeriodOfAnnuityPurchase" name="DefinedBenefitPlanPeriodOfAnnuityPurchase" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_DefinedBenefitPlanRecognizedActuarialNetGainsLosses" name="DefinedBenefitPlanRecognizedActuarialNetGainsLosses" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_DefinedContributionPensionandOtherPostretirementPlansAxis" name="DefinedContributionPensionandOtherPostretirementPlansAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_DefinedContributionPensionandOtherPostretirementPlansDomain" name="DefinedContributionPensionandOtherPostretirementPlansDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_DerivativeInstrumentsAndHedgingActivitiesDisclosureLineItems" name="DerivativeInstrumentsAndHedgingActivitiesDisclosureLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_DerivativeInstrumentsAndHedgingActivitiesDisclosureTable" name="DerivativeInstrumentsAndHedgingActivitiesDisclosureTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_DevelopingCountriesMember" name="DevelopingCountriesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_DisclosureSupplementalBalanceSheetInformationAbstract" name="DisclosureSupplementalBalanceSheetInformationAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_DisclosureValuationAndQualifyingAccountsDisclosureTableAbstract" name="DisclosureValuationAndQualifyingAccountsDisclosureTableAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_DiscontinuedOperationIncomeLossFromInvestmentInSubsidiaries" name="DiscontinuedOperationIncomeLossFromInvestmentInSubsidiaries" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="pnr_DisposalGroupIncludingDiscontinuedOperationEmployeeCompensationandBenefits" name="DisposalGroupIncludingDiscontinuedOperationEmployeeCompensationandBenefits" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="pnr_DisposalGroupIncludingDiscontinuedOperationsSharebasedCompensationExpense" name="DisposalGroupIncludingDiscontinuedOperationsSharebasedCompensationExpense" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="pnr_DistributionsToSpinOffSuccessor" name="DistributionsToSpinOffSuccessor" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_DivestituresTable" name="DivestituresTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_DocumentDocumentandEntityInformationAbstract" name="DocumentDocumentandEntityInformationAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_EarningsPerShareTable" name="EarningsPerShareTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_EffectiveIncomeTaxRateReconciliationInterestLimitations" name="EffectiveIncomeTaxRateReconciliationInterestLimitations" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_EffectiveIncomeTaxRateReconciliationTaxEffectofEarlyExtinguishmentofDebt" name="EffectiveIncomeTaxRateReconciliationTaxEffectofEarlyExtinguishmentofDebt" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_EffectiveIncomeTaxRateReconciliationWithholdingTaxes" name="EffectiveIncomeTaxRateReconciliationWithholdingTaxes" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_EmployeeStockOwnershipPlanContributionPercentageMatchOfCompensation" name="EmployeeStockOwnershipPlanContributionPercentageMatchOfCompensation" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_ExpectedAmortizationExpenseLineItems" name="ExpectedAmortizationExpenseLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_ExpectedAmortizationExpenseTable" name="ExpectedAmortizationExpenseTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_FiltrationSolutionsMember" name="FiltrationSolutionsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_Flow401KPlanMember" name="Flow401KPlanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_FlowTechnologiesMember" name="FlowTechnologiesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_ForeignGovernmentMember" name="ForeignGovernmentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_FuturedividendsAxis" name="FuturedividendsAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_FuturedividendsDomain" name="FuturedividendsDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_GoodwillImpairmentTestPeriod" name="GoodwillImpairmentTestPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_GrantDateOfTwoThousandSeventeenMember" name="GrantDateOfTwoThousandSeventeenMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_GrantDateOfTwoThousandSixteenMember" name="GrantDateOfTwoThousandSixteenMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_GrowthRatePeriodForRevenueAndOperatingProfitsAssumptions" name="GrowthRatePeriodForRevenueAndOperatingProfitsAssumptions" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_HistoricalRateOfReturnOnPlanAssets" name="HistoricalRateOfReturnOnPlanAssets" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="pnr_IncomeTaxesLineItems" name="IncomeTaxesLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_IncomeTaxesTable" name="IncomeTaxesTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_IndustrialSectorMember" name="IndustrialSectorMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_IntercompanyLoanActivityNet" name="IntercompanyLoanActivityNet" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="pnr_LineofCreditFacilityAccordionFeatureIncreaseLimit" name="LineofCreditFacilityAccordionFeatureIncreaseLimit" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="pnr_LongTermIntercompanyDebt" name="LongTermIntercompanyDebt" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="pnr_May2018ShareRepurchaseProgramMember" name="May2018ShareRepurchaseProgramMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_NVentMember" name="NVentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_OperatingLeaseExpenseTextBlock" name="OperatingLeaseExpenseTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_OperatingLeasesMember" name="OperatingLeasesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_OtherAssetsCurrentAbstract" name="OtherAssetsCurrentAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_OtherCreditFacilitiesMember" name="OtherCreditFacilitiesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_OtherCurrentAssets" name="OtherCurrentAssets" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="pnr_OtherDevelopedCountriesMember" name="OtherDevelopedCountriesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_OtherLongTermAssets" name="OtherLongTermAssets" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="pnr_OtherLongTermLiabilities" name="OtherLongTermLiabilities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="pnr_OtherSecuritiesMember" name="OtherSecuritiesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_PaymentsForProceedsFromCollectionOfAdvanceToAffiliate" name="PaymentsForProceedsFromCollectionOfAdvanceToAffiliate" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_PelicanMember" name="PelicanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_PrepaidTaxesNoncurrent" name="PrepaidTaxesNoncurrent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="pnr_Prepaidtaxeslongterm" name="Prepaidtaxeslongterm" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="pnr_QuarterlyFinancialInformationLineItems" name="QuarterlyFinancialInformationLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_QuarterlyFinancialInformationTable" name="QuarterlyFinancialInformationTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_ReconciliationOfUnrecognizedTaxBenefitsTableTextBlock" name="ReconciliationOfUnrecognizedTaxBenefitsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_ResidentialSectorMember" name="ResidentialSectorMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_RestrictedStockAndRestrictedStockUnitsRSUsMember" name="RestrictedStockAndRestrictedStockUnitsRSUsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_RestructuringCostsBySegmentTableTextBlock" name="RestructuringCostsBySegmentTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_RevenuesPercent" name="RevenuesPercent" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_SalariedPlanMember" name="SalariedPlanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_ScheduleOfAcquiredIntangibleAssetsByMajorClassTable" name="ScheduleOfAcquiredIntangibleAssetsByMajorClassTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_ScheduleOfIntangibleAssetsTableTextBlock" name="ScheduleOfIntangibleAssetsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_ScheduleOfMaturitiesOfDebtDisclosureTextBlock" name="ScheduleOfMaturitiesOfDebtDisclosureTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_ScheduleOfTargetAndActualAllocationOfPlanAssetsTableTextBlock" name="ScheduleOfTargetAndActualAllocationOfPlanAssetsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_SegmentIncomeLoss" name="SegmentIncomeLoss" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="pnr_SegmentReportingNetsalesassociatedwithMajorCustomerpercent" name="SegmentReportingNetsalesassociatedwithMajorCustomerpercent" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_SeniorNotesFivePointZeroZeroZeroPercentDueTwentyTwentyOneMember" name="SeniorNotesFivePointZeroZeroZeroPercentDueTwentyTwentyOneMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_SeniorNotesFourPointSixFivePercentDueTwentyTwentyFiveMember" name="SeniorNotesFourPointSixFivePercentDueTwentyTwentyFiveMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_SeniorNotesMaturingIn2019Member" name="SeniorNotesMaturingIn2019Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_SeniorNotesThreePointOneFiveZeroPercentDueTwentyTwentyTwoMember" name="SeniorNotesThreePointOneFiveZeroPercentDueTwentyTwentyTwoMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_SeniorNotesThreePointSixTwoFivePercentDueTwentyTwentyMember" name="SeniorNotesThreePointSixTwoFivePercentDueTwentyTwentyMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_SeniorNotesTwoPointFourFivePercentDueTwentyNineteenMember" name="SeniorNotesTwoPointFourFivePercentDueTwentyNineteenMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_SeniorNotesTwoPointNinePercentDueTwentyEighteenMember" name="SeniorNotesTwoPointNinePercentDueTwentyEighteenMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_SeniorNotesTwoPointSixFiveZeroPercentDueTwentyNineteenMember" name="SeniorNotesTwoPointSixFiveZeroPercentDueTwentyNineteenMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_Separationcosts" name="Separationcosts" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_SeveranceAndRelatedCostsMember" name="SeveranceAndRelatedCostsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsConversionOfUnits" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsConversionOfUnits" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsSpinOffTransactionAdjustments" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsSpinOffTransactionAdjustments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpiryPeriodFromDateOfGrant" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardExpiryPeriodFromDateOfGrant" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageExercisePriceAbstract" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageExercisePriceAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_ShareBasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsConversionOfUnitWeightedAverageGrantDateFairValue" name="ShareBasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsConversionOfUnitWeightedAverageGrantDateFairValue" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_ShareBasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsSpinOffTransactionAdjustmentWeightedAverageGrantDateFairValue" name="ShareBasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsSpinOffTransactionAdjustmentWeightedAverageGrantDateFairValue" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_ShareIncentivePlansAbstract" name="ShareIncentivePlansAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_SharebasedCompensationArrangementbySharebasedPaymentAwardConversionRateOfTarget" name="SharebasedCompensationArrangementbySharebasedPaymentAwardConversionRateOfTarget" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_SharesSurrenderedByEmployees" name="SharesSurrenderedByEmployees" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="pnr_SharesSurrenderedByEmployeesShares" name="SharesSurrenderedByEmployeesShares" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_SpinoffTransactionEquityInterestsIssuedPerOrdinaryPredecessorShare" name="SpinoffTransactionEquityInterestsIssuedPerOrdinaryPredecessorShare" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_StockIncentivePlanTwentyTwelveMember" name="StockIncentivePlanTwentyTwelveMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_StockholdersEquityNoteDisclosureLineItems" name="StockholdersEquityNoteDisclosureLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_StockholdersEquityNoteDisclosureTable" name="StockholdersEquityNoteDisclosureTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_SubleaseMember" name="SubleaseMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_SupplementalBalanceSheetInformationLineItems" name="SupplementalBalanceSheetInformationLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_SupplementalBalanceSheetInformationTable" name="SupplementalBalanceSheetInformationTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_SupplementalBalanceSheetInformationTableTextBlock" name="SupplementalBalanceSheetInformationTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_TaxCutsAndJobsActOf2017ChangeInTaxRateDeferredTaxAssetIncomeTaxExpenseBenefit" name="TaxCutsAndJobsActOf2017ChangeInTaxRateDeferredTaxAssetIncomeTaxExpenseBenefit" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="pnr_TaxCutsAndJobsActOf2017ChangeInTaxRateIncreaseDecreaseInPrepaidLongTermAsset" name="TaxCutsAndJobsActOf2017ChangeInTaxRateIncreaseDecreaseInPrepaidLongTermAsset" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="pnr_TaxCutsAndJobsActOf2017IncomeTaxExpenseBenefit" name="TaxCutsAndJobsActOf2017IncomeTaxExpenseBenefit" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="pnr_TaxCutsAndJobsActOf2017IncompleteAccountingChangeInTaxRateDeferredTaxAssetProvisionalIncomeTaxExpenseBenefit" name="TaxCutsAndJobsActOf2017IncompleteAccountingChangeInTaxRateDeferredTaxAssetProvisionalIncomeTaxExpenseBenefit" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="pnr_TaxCutsAndJobsActOf2017IncompleteAccountingProvisionalIncomeTaxExpenseBenefit" name="TaxCutsAndJobsActOf2017IncompleteAccountingProvisionalIncomeTaxExpenseBenefit" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="pnr_TaxCutsAndJobsActOf2017IncompleteAccountingTransitionTaxForAccumulatedForeignEarningsProvisionalIncomeTaxExpenseBenefit" name="TaxCutsAndJobsActOf2017IncompleteAccountingTransitionTaxForAccumulatedForeignEarningsProvisionalIncomeTaxExpenseBenefit" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="pnr_TaxCutsAndJobsActOf2017MeasurementPeriodAdjustmentIncomeTaxExpenseBenefit" name="TaxCutsAndJobsActOf2017MeasurementPeriodAdjustmentIncomeTaxExpenseBenefit" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="pnr_TaxCutsAndJobsActOf2017ReclassificationFromAociToRetainedEarnings" name="TaxCutsAndJobsActOf2017ReclassificationFromAociToRetainedEarnings" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="pnr_TaxCutsandJobsActof2017CorporateFederalTaxRate" name="TaxCutsandJobsActof2017CorporateFederalTaxRate" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="pnr_TenderOffer" name="TenderOffer" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="pnr_UnrecognizedTaxBenefitsReductionsResultingFromSettlementsWithTaxingAuthoritiesAndLapseOfApplicableStatuteOfLimitations" name="UnrecognizedTaxBenefitsReductionsResultingFromSettlementsWithTaxingAuthoritiesAndLapseOfApplicableStatuteOfLimitations" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="pnr_WesternEuropeMember" name="WesternEuropeMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
</xsd:schema>
