• McTighe Industries

• Mer-Made Filter

• Met-Pro Corporation

• Noble Trade

• Northstar Water Conditioning

• Nu-Calgon Wholesaler

• O'Donnell Painting Corporation

• Omni Metalcraft Corp.

• Ondeo Degremont, Inc.

• PEM Fountain Company

• Peerless Painting Co. Inc.

• Photo Lab Systems, Inc.

• Pure Water, Inc.

• R. P. Adams Co., Inc.

• Raypak Canada Ltd.

• Recreonics, Inc.

• SERFILCO

• Santa Barbara Control Systems

• Smith & Loveless

• Sparkler Filters

• The Cleveland Wire Cloth & Manufacturing Company

• Tri-River Design & Construction, Inc.

• Trion, Inc.

• U.S. Filter

• U.S. Filter Microfloc Products

• US Filter