• F. P. Smith Wire Cloth Co.

• FSD

• Faber Associates International

• Fantastic Fountains

• Filter Specialists, Inc.

• Filtronics, Inc.

• Flint & Walling, Inc.

• General Ecology

• Halco Products Co. Div.

• Halsey Taylor

• Hydro-Air of Minnesota

• I W Industries

• Industrial Filter & Pump Mfg. Co.

• Infiltrator Systems Inc.

• J W I

• Jacuzzi Canada

• Joseph Davis

• KDI Paragon Aquatics

• Kemco Systems

• Keystone Filter Division

• Kinetico

• Kraissl Co.

• Leer Electric Inc.

• Link-O-Matic Mfg. Co.

• Lobar, Inc.

• McTighe Industries