Apollo Valves/Conbraco Ind.

CSA International- Canada

CSA International- Cleveland

IAPMO R&T Lab

In-Sink-Erator

NSF International

Professional Service Industry

SGS U.S. Testing Co., Inc.

Sloan Flushmate

Stevens Institute of Technology

USC School of Eng. FCCCHR

US Analytical Laboratories

Wilkins/Division of Zurn Ind.

WRC- NSF Ltd.

Wyle Laboratories

Pageland, SC

Toronto, Canada

Cleveland, OH

Ontario, CA

Racine, WI

Ann Arbor, MI

Pittsburgh, PA

Tulsa, OK

New Hudson, MI

Hoboken, NJ

Los Angeles, CA

Fullerton, CA

Paso Robles, CA

Oakdale, Gwent, Wales, UK

Huntsville, AL