| Action Mfg. & Supply Inc. |
| Addie Water Sys., Inc. |
| Alan Mfg. |
| Applied Membranes, Inc. |
| Applied Water Engineering, Inc. |
| Aqua Care Sys., Inc. |
| AQUApura - Tempest Environmental Systems, Inc. |
| Atlantic Filter Corp. |
| Azco Ind. Ltd. |
| Braswell Water Quality Sys., Inc. |
| Canadian Water Cond. Inc. |
| Challenger Water Int'l., Inc. |
| Charger Water Treatment Products, LLC. |
| Clack Corp. |
| Dime Water |
| DuPage Water Treat. Prod. |
| Durastill |
| Engineering Specialties |
| Enting Water Cond., Inc. |
| Filter Soft |
| Filtercold |
| FilterCor |
| Horner Discus Int'l. Inc. |
| Hudson Corp. of Texas |
| Hydro Systems Int'l., Inc. |
| International Water Werks, Inc. |
| Ionics, Inc. |
| Krudico, Inc. |
| Lancaster Pump |
| Link-O-Matic Co., Inc. |
| MID AMERICA WATER TREATMENT |
| New Age Water Tech. |
| Oasis Corp. |
| Ozone Pure Water Inc. |
| Ozotech, Inc. |
| Pacific Ozone Tech., Inc. |
| Pure Aqua, Inc. |
| Rayne Corp. |
| Reynolds Water Cond. Co. |
| Safe Water Tech., Inc. |
| Smith & Loveless, Inc. |
| Springsoft Int'l. |
| Sunshine Water Cond. |
| Triple O Sys., Inc. |
| Water Sciences, Inc. |
| Water Tec Tucson |
| Water-Right, Inc. |
| WaterCare Corp. |
| Waterite Inc. |
| Watermark Corp. |
| Western Water Prod., Inc. |
| Wood Bros. Ind. II |