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Pentair Acquires Delta Environmental Products to Complement Existing Business

February 23, 2005

GOLDEN VALLEY, Minn., Feb. 23 /PRNewswire-FirstCall/ -- Pentair (NYSE: PNR) today announced that it has acquired the assets of Delta Environmental Products, Inc., a privately held company, to complement existing businesses in its Water Group. Delta will become part of Pentair's leading water and wastewater business, which serves residential, commercial and municipal markets. Pentair anticipates the acquisition will be accretive to earnings within the first 12 months of ownership.

Delta offers a full range of wastewater treatment products for the residential and commercial onsite treatment markets. Pentair's existing pump businesses manufacture products ranging from light-duty household utility pumps to massive, high-flow turbine pumps designed for municipal water applications.

"Delta's product lines -- including its aerobic treatment units ("ATU"), and recently introduced fixed film technology -- present an attractive growth opportunity for the pump business as onsite treatment becomes more common," said Richard Cathcart, Pentair vice chairman and president of the Water Group. "The market for safe, effective onsite wastewater disposal is growing rapidly, as more than 25% of new housing starts use onsite treatment methods." The acquisition will leverage Pentair's and Delta's existing distribution networks to provide customers with market-leading solutions.

Founded in 1985, Delta is a respected leader in wastewater systems research, development and manufacturing. The company is based in Denham Springs, Louisiana and employs approximately 45 people. Delta recorded 2004 sales of about $12 million.

About Pentair, Inc.

Pentair ( ) is a diversified operating company headquartered in Minnesota. Its Water Group is a global leader in providing innovative products and systems used worldwide in the movement, treatment, storage and enjoyment of water. Pentair's Enclosures Group is a leader in the global enclosures market, designing and manufacturing standard, modified and custom enclosures that house and protect sensitive electronics and electrical components. With 2004 revenues of $2.28 billion, or $2.76 billion on a pro forma basis, Pentair has approximately 13,000 employees worldwide.

SOURCE Pentair, Inc.

CONTACT: Rachael Jarosh
Mark Cain
Investor Relations