Pentairs Aquatic Systems Business Acquires Aquatic Eco-Systems, Inc.

Release Date: October 12th, 2012

The Aquatic Systems global business unit of Pentair Ltd. (NYSE: PNR) announced today its acquisition of Aquatic Eco-Systems, Inc. (AES), a global leader in custom design solutions, equipment and supplies distribution, and technical support for aquaculture markets. AES serves a variety of aquatic interests and industries, from commercial aquaculture and lake management to public aquariums and water gardens.

“The acquisition of AES is in line with our strategy to focus on the expanding aquaculture industry,” said Karl Frykman, President of Pentair’s Aquatic Systems global business unit. “Combining our world-class operational processes, investment capabilities and global reach with AES’s extensive aquatic product offerings, systems and their in-house team of biologists, engineers and technicians, creates a comprehensive resource for aquaculture technology, equipment and engineered solutions.”

AES is headquartered in Apopka, Florida. Robert D. Miller will continue in his role as Chief Financial Officer of Pentair’s Aquatic Systems business and has been appointed to lead the day-to-day operations of its aquaculture business, including AES.

Terms of the deal were not disclosed.

ABOUT PENTAIR AQUATIC SYSTEMS

Pentair’s Aquatic Systems business provides leading edge equipment, accessories and water technology solutions to the swimming pools and aquaculture industries. Aquatic Systems produces a broad line of products from pumps and filtration equipment to thermal products, automated controls, lights, automatic cleaners, water purification and treatment technology, water features, and more. Applications for Aquatic Systems products include maintenance, repair and renovation of existing in-field equipment, as well as new installations in North America, Europe, and emerging markets such as China, Latin America and other countries.

ABOUT PENTAIR LTD.

Pentair Ltd. (www.pentair.com) delivers industry-leading products, services and solutions for its customers’ diverse needs in water and other fluids, thermal management and equipment protection. more than $7 billion, Pentair employs more than 30,000 people worldwide.

PENTAIR CONTACTS:

Jim Lucas Vice President, Investor Relations Tel.: (763) 656-5575 E-mail: jim.lucas@pentair.com

Betsy Day Manager, Corporate Communications Tel.: 763-656-5537 Email: betsy.day@pentair.com