Chemical Water Treatment
| AWT- Advanced Water Tech. |
| Action Mfg. & Supply Inc. |
| Alan Mfg. |
| American Engineering Svc., Inc. |
| American Resin Corp. |
| Applied Membranes, Inc. |
| Aqua Man Inc. |
| Arc Water Treat. Co. |
| Argo Scientific |
| Ashland Chemical Co. |
| Barnant Co. |
| Better Water Ind. Inc. |
| Betz Dearborn |
| Bio-Chem Assoc., Inc. |
| Bio-Cide Inc. |
| BIO-SYSTEMS Corporation |
| Capital Controls Co., Inc. |
| Carus Chemical Co. |
| ChemFree Tech. |
| ChemTreat, Inc. |
| Dow Chemical Co. |
| ERM |
| Elga Inc. |
| Engineering Specialties |
| FWT Wholesale Inc. |
| F.E. Myers Co. |
| Faiz Enterprises |
| Filter Soft |
| Fluid Sys. & Controls, Inc. |
| Fuller Engineering Inc. |
| General Chemical Corp. |
| Hanna Instruments, Inc. |
| Hood Mechanical Co. |
| Horner Discus Int'l. Inc. |
| Ionics, Inc. |
| Keytech Water Mgmt. |
| Kjell Corp., (The) |
| Krudico, Inc. |
| Link-O-Matic Co., Inc. |
| Menco Tech., Inc. |
| Met-Pro Corp. |
| Mid South Chemical Co., Inc. |
| Mountain Filtration Sys., Inc. |
| Nelsen Corp. |
| New Age Water Tech. |
| Nimbus Water Sys., Inc. |
| Oasis Corp. |
| Osmonics Autotrol |
| Procam Controls, Inc. |
| Professional Water Tech., Inc. |
| Pure Aqua, Inc. |
| Ques Ind. Inc. |
| Quint Corp. |
| RSI Int'l. |
| R.O. Sys. Int'l. |
| Rochester Midland Corp. |
| Smith & Loveless, Inc. |
| Southeastern Filtration & Equip. Sys. |
| Spectrum Labs, Inc. |
| Springsoft Int'l. |
| Technical Prod. Corp. |
| TERLYN Industries, Inc. |
| TriSep Corp. |
| Watcon, Inc. |
| Water-Right, Inc. |
| Watermark Corp. |
| Wayne Consultants, Inc. |
| Earthcrew, Inc. |
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