| A-Certi-Pure Drinking Water Systems |
| ATP Mfg. Ltd. |
| Action Mfg. & Supply Inc. |
| Addie Water Sys., Inc. |
| Advanced Membrane Tech., Inc. |
| Air & Water Purification, Inc. |
| Alpine Softener Corp. |
| Amy Controls, Inc. |
| Applied Membranes, Inc. |
| Aqua Care Sys., Inc. |
| Aqua Man Inc. |
| Aqua Prod. Inc. |
| Aquabase |
| AQUAPURA Corp. (The) |
| AQUApura - Tempest Environmental Systems, Inc. |
| Arizona Water Vendors |
| Atlantic Filter Corp. |
| Atlantic Ultraviolet Corp. |
| B & R Ind. |
| Beacon Water Equip. Co., Inc. |
| Bestech, Inc. |
| Bio-Chem Assoc., Inc. |
| CNM2 Enterprises, Inc. |
| Canadian Water Cond. Inc. |
| Capital Controls Co., Inc. |
| Cartwright Consulting Co. |
| Challenger Water Int'l., Inc. |
| Charger Water Treatment Products, LLC. |
| ChemFree Tech. |
| Clack Corp. |
| Clarity Filters |
| Clean Water Sys., Int'l. |
| Clean World Waters |
| CUNO Water Factory Sys. |
| CuZn Water Sys. |
| Dime Water |
| DuPage Water Treat. Prod. |
| Durastill |
| Ebtech Corp. |
| Engineering Specialties |
| Enting Water Cond., Inc. |
| Environmental Safety Prod. - E.S.P. |
| EPIC Water Sys. |
| Everpure, Inc. |
| FWT Wholesale Inc. |
| F.M. Mark Electronics, Inc. |
| Filter Soft |
| Filtercold |
| Flowmatic Sys., Inc. |
| General Ecology, Inc. |
| Global EnviroScience Technologies, Inc. |
| Great Lakes Int'l., Inc. |
| H2O Int'l. Inc. |
| Harmsco Filtration Prod. |
| Hellenbrand Water Cond., Inc. |
| Horner Discus Int'l. Inc. |
| Hudson Corp. of Texas |
| Hurley Chicago Co., Inc. |
| Hydropure Water Treat. Co. |
| Hydrotech, Inc. |
| International Water Werks, Inc. |
| Ion Exchange Tech. |
| Ionics, Inc. |
| KDF Fluid Treat., Inc. |
| Katadyn U.S.A., Inc. |
| Keystone Filter Div. |
| Krudico, Inc. |
| Lancaster Pump |
| Link-O-Matic Co., Inc. |
| MTI Precision Prod. |
| Metanoia Int'l. Sales Co. |
| MID AMERICA WATER TREATMENT |
| Mid South Chemical Co., Inc. |
| Moria Crystal LA, Inc. |
| Mountain Filtration Sys., Inc. |
| N.R.G. Enterprises, Inc. |
| Nelsen Corp. |
| New Age Water Tech. |
| Nimbus Water Sys., Inc. |
| O3 Assoc. |
| O-SO Pure |
| Oasis Corp. |
| Osmonics Desal |
| Ozone Pure Water Inc. |
| Ozotech, Inc. |
| Pro-Flo Prod., Inc. |
| Procam Controls, Inc. |
| Pure 1 Sys. |
| Pure Aqua, Inc. |
| Pure Water Source (The) |
| Puregen Tech. Inc. |
| PURITY Corporation (The) |
| QMP, Inc. |
| R-P Prod. |
| R-Can Environ. Inc. |
| RainSoft |
| Rosedale Prod. |
| Safe Water Tech., Inc. |
| SemperPure Sys., Inc. |
| Separmatic Filter Co. |
| Smith & Loveless, Inc. |
| Springsoft Int'l. |
| Sprite Ind., Inc. |
| Sta-Rite Ind. |
| SunRay Tech., Inc. |
| Sunshine Water Cond. |
| Triple O Sys., Inc. |
| U.S. Filter |
| Vortex Water Tech., Inc. |
| Water Equip. Tech. Inc. |
| Water Group Sys., Inc. |
| Water Services Corp. |
| Water Tec Int'l. |
| Water Tec Tucson |
| Waterite Inc. |
| Watermark Corp. |
| Watersolve Int'l. |
| Waterwise Inc. |
| Western Water Prod., Inc. |
| Wood Bros. Ind. II |
| World Sector, Inc. |
| Zhou Yuan Int'l. Corp. |
| Zyzatech Water Sys., Inc. |
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