Membranes, Microfiltration
| AF Equip. Co. Inc. |
| ATP Mfg. Ltd. |
| Action Mfg. & Supply Inc. |
| Advanced Membrane Tech., Inc. |
| Alamo Water Refiners, Inc. |
| American Engineering Svc., Inc. |
| Applied Membranes, Inc. |
| Aqua Man Inc. |
| Canadian Water Cond. Inc. |
| Cartwright Consulting Co. |
| Challenger Water Int'l., Inc. |
| Charger Water Treatment Products, LLC. |
| Cochrane, Inc. |
| DuPage Water Treat. Prod. |
| Eden Equip. Co. |
| Elga Inc. |
| Environmental Prod. USA, Inc. |
| Fibercor |
| Filter Prod., Separations, & Sys. Inc. |
| Filter Soft |
| Flowmatic Sys., Inc. |
| Global EnviroScience Technologies, Inc. |
| Great Lakes Int'l., Inc. |
| Horner Discus Int'l. Inc. |
| Kinetico Inc., Engineered Sys. Div. |
| Koch Membrane Systems |
| Lancaster Pump |
| Link-O-Matic Co., Inc. |
| Meissner Filtration Prod., Inc. |
| Memtec America Corp. |
| Mountain Filtration Sys., Inc. |
| Nimbus Water Sys., Inc. |
| Osmonics |
| Osmonics Autotrol |
| Osmonics Desal |
| Pure Aqua, Inc. |
| Puregen Tech. Inc. |
| Purification Prod. Co. |
| R.O. UltraTec USA |
| Smith & Loveless, Inc. |
| SpinTek Filtration |
| Springsoft Int'l. |
| SunRay Tech., Inc. |
| Sunshine Water Cond. |
| TriSep Corp. |
| U.S. Filter |
| Water Equip. Tech. Inc. |
| Water Group Sys., Inc. |
| Water Tec Int'l. |
| Water Tec Tucson |
| Water-Right, Inc. |
| Waterite Inc. |
| Watermark Corp. |
| Western Water Prod., Inc. |
| Wood Bros. Ind. II |
|
|