• Alpha Water Conditioning Co.

• American Maintenance Systems, LLC

• Amtrol

• Amwell

• Anderson Chemical Co.

• Anderson Water Systems Ltd.

• Aqua-Chem

• Aqua-Flo

• AquaMaster Fountains & Aerator

• Artisan Painting

• B&L Fence

• BVS Concrete Specialties

• Badger Meter

• Beaumont Sign Company

• Belco Mfg. Co.

• Bio-Microbics, Inc.

• Bord na Mona

• Bruner Water Treatment Systems

• CAM Manufacturing

• Cambridge, Inc.

• Capital Controls Company Inc.

• Carbtrol Corporation

• Cascade Pump Company

• Charles Ramm Associates

• Cla-Val Co.

• Colonial Brass Co.

• Composite Structures, Inc.

• Construction Design Technologies

• Culligan International

• DLM Plastics Corp.

• Del Industries

• Devar, Inc.

• DiCicco Contracting Co.

• Diamond Water Systems

• EIMCO Process Equipment Co.

• Ecodyne Ltd.

• Ecodyne Water Treatment

• Engelhard Corporation

• Entoleter LLC

• F. P. Smith Wire Cloth Co.

• FE Myers

• FSD

• Farr Associates

• Ferro Corp.

• Filtronics, Inc.

• Finnan Engineered Products Ltd.

• Flint & Walling, Inc.

• Franklin Miller

• Freedom Plastics, Inc.

• Getz Recycle

• Gilson Co.

• Glenridge Equipment Corporation

• Global Equipment Marketing, Inc.

• Grace Dearborn Inc.

• Gravity Flow Systems

• Hempfield Foundries Co.

• Hoffman Air & Filtration Systems

• Hydroworks, LLC

• ISCO

• Idealco Inc.

• Industrial Filter & Pump Mfg. Co.

• Invincible Air Flow Systems

• J.D. Gould Company, Inc.

• J.L. Turner Co.

• JWC Environmental

• Kahl Scientific Instrument Corporation

• Kemco Systems

• Keystone Filter Division

• Kinetico

• Komline-Sanderson Ltd

• Kunkle Valves

• LIGHTIN

• Lakeside Equipment Corporation

• Link-O-Matic Mfg. Co.

• Magnor Inc.

• Melrose Chemicals Ltd.

• Millipore

• Miracle Sealants & Abrasives Co.

• Moyno, Inc.

• Mueller Canada Inc.

• NEOPERL

• Nalco Canada Inc.

• Neptune Chemical Pump Co.

• Nordic Systems

• Northstar Water Conditioning

• Nu-Calgon Wholesaler

• ONDEO Nalco Company

• Oakite Products of Canada Ltd.

• Obermeyer Hydro

• Ondeo Degremont, Inc.

• Osmonics

• PCI-Wedeco Environmental Technologies

• Paddock Pool Equipment Co., Inc.

• Parkson Corporation

• Patterson Pump Co.

• Peerless Painting Co. Inc.

• Philadelphia Mixers

• Power Plant Supply Company

• Precise Forms Inc.

• Pure Water, Inc.

• Purestream

• Qual Tech Enterprises

• Quatic Industries

• R-Can Environmental Inc.

• Ringtown Concrete Products

• S-N-T Co.

• SMRT, Inc.

• Samscreen, Inc.

• Smith & Loveless

• Sportmaster

• Stormwater Management

• Superior Manufacturing Division

• Taylor Technologies

• The Pentair Pump Group, Inc. (F.E.Myers)

• Time Mark Corporation

• Townsend Associates

• Tri-River Design & Construction, Inc.

• U.S. Filter

• U.S. Filter Microfloc Products

• U.S. Filter/Stranco

• URS Corporation

• US Filter

• United States Filter Corp.

• Vanton Pump & Equipment Corp.

• Vaponics/Osmonics

• W.S. TYLER - International

• WASTECORP. PUMPS

• WESCO Distribution Inc.

• Walker Process Equipment

• Warminster Fiberglass

• Waterloo Biofilter Systems

• Western Pneumatics

• Western Wire Works

• Xerxes Corp.

• Yardney Water Management Systems

• Yeomans Chicago Corporation