Switches, Flow
| Action Mfg. & Supply Inc. |
| Applied Membranes, Inc. |
| Applied Water Engineering, Inc. |
| Aquest, Inc. |
| Charger Water Treatment Products, LLC. |
| Compac Engineering Inc. |
| Craig Ocean Sys., Inc. |
| DuPage Water Treat. Prod. |
| Engineering Specialties |
| Filter Soft |
| Gems Sensors |
| General Pump Inc. |
| Harwil Corp. |
| HM Digital, Inc. |
| Horner Discus Int'l. Inc. |
| Hypro Corp. |
| ITT Barton |
| Krevco |
| Mid-West Instrument |
| Milltronics, Inc. |
| Oasis Corp. |
| Ozone Pure Water Inc. |
| Ozotech, Inc. |
| Pure Aqua, Inc. |
| Ryan Herco Prod. Corp. |
| Sunshine Water Cond. |
| Water Tec Int'l. |
| Water Tec Tucson |
| Western Water Prod., Inc. |
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