• Alpha Water Conditioning Co.

• Anderson Chemical Co.

• Anderson Water Systems Ltd.

• Aqua Treatment Service

• B&L Fence

• Bruner Water Treatment Systems

• Cla-Val Co.

• Cleaver-Brooks Division of Aqua-Chem, Inc.

• Culligan of Canada Ltd.

• Diamond Water Systems

• Ecodyne Ltd.

• Ecodyne Water Treatment

• Everpure

• Filtronics, Inc.

• Finnan Engineered Products Ltd.

• Flint & Walling, Inc.

• Industrial Filter & Pump Mfg. Co.

• J.L. Turner Co.

• Kemco Systems

• Larson Design Group, Inc.

• Leedy Electric Corporation

• Link-O-Matic Mfg. Co.

• Northstar Water Conditioning

• Peerless Painting Co. Inc.

• Pure Water, Inc.

• Select Engineered Systems

• Smith & Loveless

• Steven Winter Associates

• Tri-River Design & Construction, Inc.

• U.S. Filter

• US Filter

• United States Filter Corp.

• Ziegler Industries, Inc.