Engineering Services
| Advanced Membrane Tech., Inc. |
| Alpine Softener Corp. |
| Applied Water Engineering, Inc. |
| Aqua Prod. Inc. |
| Aquanetics Sys., Inc. |
| Bio-Chem Assoc., Inc. |
| CNM2 Enterprises, Inc. |
| Cartwright Consulting Co. |
| ChemFree Tech. |
| Cyrus Rice Water Consultants |
| DuPage Water Treat. Prod. |
| ERM |
| Engineering Specialties |
| F.M. Mark Electronics, Inc. |
| Horner Discus Int'l. Inc. |
| WEDECO Ideal Horizons |
| O-SO Pure |
| Oasis Corp. |
| Ozone Pure Water Inc. |
| QMP, Inc. |
| Rowlands Sales Co., Inc. |
| SunRay Tech., Inc. |
| Sunshine Water Cond. |
| U.S. Filter |
| Water Group Sys., Inc. |
| Water Sciences, Inc. |
| Water Services Corp. |
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