1. AMERICAN Cast Iron Pipe Company
2. APAC International Corporation
3. Cascade Waterworks Mfg. Co.
4. E.J. Prescott Inc.
5. Guhring Inc.
6. JCM Industries Inc.
7. LB Water Service Inc.
8. McWane Inc.
9. Mueller Water Products Inc.
10. Petersen Products Co.
11. PowerSeal Pipeline Products Corporation
12. Robar Industries Ltd.
13. Romac Industries Inc.
14. The Ford Meter Box Company Inc.
15. UTS Engineering Limited