Filters, Color & Turbidity
| ATP Mfg. Ltd. |
| Action Mfg. & Supply Inc. |
| Addie Water Sys., Inc. |
| Alamo Water Refiners, Inc. |
| Alan Mfg. |
| Alpine Softener Corp. |
| Applied Membranes, Inc. |
| Aqua Care Sys., Inc. |
| Aqua Man Inc. |
| AQUAPURA Corp. (The) |
| AQUApura - Tempest Environmental Systems, Inc. |
| Atlantic Filter Corp. |
| Bestech, Inc. |
| Bio-Chem Assoc., Inc. |
| Canadian Water Cond. Inc. |
| Challenger Water Int'l., Inc. |
| Charger Water Treatment Products, LLC. |
| Clack Corp. |
| CUNO Water Factory Sys. |
| Dime Water |
| Doulton Water Filters |
| DuPage Water Treat. Prod. |
| Ebtech Corp. |
| Eden Equip. Co. |
| Engineering Specialties |
| Enting Water Cond., Inc. |
| Enviro Systems Corp. |
| Envirogard Prod. Ltd. |
| Environmental Safety Prod. - E.S.P. |
| EPIC Water Sys. |
| Ermco, Inc. |
| Everpure, Inc. |
| Fibercor |
| fibredyne inc. |
| Filter Soft |
| Filtercold |
| FilterCor |
| Flint & Walling, Inc. |
| Flowmatic Sys., Inc. |
| H2O Int'l. Inc. |
| Horner Discus Int'l. Inc. |
| Hudson Corp. of Texas |
| Hurley Chicago Co., Inc. |
| Hydro Systems Int'l., Inc. |
| Hydropure Water Treat. Co. |
| International Water Werks, Inc. |
| Ion Exchange Tech. |
| Ionics, Inc. |
| Johnson Filtration Prod., Inc. |
| KX Ind., L.P. |
| Lancaster Pump |
| Link-O-Matic Co., Inc. |
| Marlo, Inc. |
| Meissner Filtration Prod., Inc. |
| MID AMERICA WATER TREATMENT |
| Mountain Filtration Sys., Inc. |
| N.R.G. Enterprises, Inc. |
| New Age Water Tech. |
| Oasis Corp. |
| Omnipure Filter Co. |
| Orbeco Analytical Sys., Inc. |
| Ozone Pure Water Inc. |
| Pro-Flo Prod., Inc. |
| Pure Aqua, Inc. |
| Pure Water Source (The) |
| PURITY Corporation (The) |
| Quadel Ind. Inc. |
| Reynolds Water Cond. Co. |
| Rosedale Prod. |
| Safe Water Tech., Inc. |
| Separmatic Filter Co. |
| Smith & Loveless, Inc. |
| Southeastern Filtration & Equip. Sys. |
| SunRay Tech., Inc. |
| Sunshine Water Cond. |
| Triple O Sys., Inc. |
| Water Equip. Tech. Inc. |
| Water Services Corp. |
| Water Tec Int'l. |
| Water Tec Tucson |
| WaterCare Corp. |
| Watermark Corp. |
| Western Water Prod., Inc. |
| Western (Water) Purifier Co. |
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