Action Mfg. & Supply Inc.

Aqua Man Inc.

AquaFlow Pump & Supply Co.

Better Water Ind. Inc.

Bio-Chem Assoc., Inc.

DuPage Water Treat. Prod.

Enting Water Cond., Inc.

FWT Wholesale Inc.

Filter Soft

Horner Discus Int'l. Inc.

Krudico, Inc.

MID AMERICA WATER TREATMENT

Mountain Filtration Sys., Inc.

New Age Water Tech.

Nu-Calgon

Osmonics Autotrol

Penn Process Tech., Inc.

R.O. Sys. Int'l.

Semblex, Inc.

Seter Engineering Corp.

Sunshine Water Cond.