Membrane Housings
| ATP Mfg. Ltd. |
| Action Mfg. & Supply Inc. |
| Addie Water Sys., Inc. |
| Advanced Membrane Tech., Inc. |
| Alamo Water Refiners, Inc. |
| Alpine Softener Corp. |
| American Engineering Svc., Inc. |
| Applied Membranes, Inc. |
| Aqua Care Sys., Inc. |
| Aqua Man Inc. |
| Aqua Pro Membranes |
| Aqua Prod. Inc. |
| Aquabase |
| AQUApura - Tempest Environmental Systems, Inc. |
| Atlantic Filter Corp. |
| Canadian Water Cond. Inc. |
| Cartwright Consulting Co. |
| Challenger Water Int'l., Inc. |
| Charger Water Treatment Products, LLC. |
| Clack Corp. |
| Clean World Waters |
| Coster Engineering |
| DuPage Water Treat. Prod. |
| Eden Equip. Co. |
| Enting Water Cond., Inc. |
| Environmental Prod. USA, Inc. |
| FWT Wholesale Inc. |
| Filter Prod., Separations, & Sys. Inc. |
| Filter Soft |
| Flowmatic Sys., Inc. |
| Great Lakes Int'l., Inc. |
| Home Reverse Osmosis Sys. |
| Horner Discus Int'l. Inc. |
| Hudson Corp. of Texas |
| Hydranautics |
| Hydrocomponents & Tech., Inc. |
| International Water Werks, Inc. |
| Lancaster Pump |
| Link-O-Matic Co., Inc. |
| Moria Crystal LA, Inc. |
| Mountain Filtration Sys., Inc. |
| Nelsen Corp. |
| New Age Water Tech. |
| Nimbus Water Sys., Inc. |
| Osmonics |
| Osmonics Autotrol |
| Osmotik / Osmosis Tech., Inc. |
| Pro-Flo Prod., Inc. |
| Pure 1 Sys. |
| Pure Aqua, Inc. |
| Puregen Tech. Inc. |
| R.O. UltraTec USA |
| Rosedale Prod. |
| Safe Water Tech., Inc. |
| SemperPure Sys., Inc. |
| SpinTek Filtration |
| Springsoft Int'l. |
| SunRay Tech., Inc. |
| Sunshine Water Cond. |
| TGI Pure |
| Water Equip. Tech. Inc. |
| Water Group Sys., Inc. |
| Water Services Corp. |
| Water Tec Tucson |
| Waterite Inc. |
| Western Water Prod., Inc. |
| Wood Bros. Ind. II |
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