1. Al Tamam Modern Plastic Factory
2. Aliaxis Group SA
3. Bogda Machinery Group
4. Charlotte Pipe and Foundry
5. Chevron Phillips Chemical Company LLC
6. Clover Pipelines Pty Ltd.
7. CRH PLC
8. Elysee Irrigation Ltd.
9. Genuit Group PLC
10. Georg Fischer Ltd.
11. Heap Wah Enterprise Sdn. Bhd.
12. Iplex Pipelines Australia Pty Limited
13. Jindal PVC Pipes & Fittings
14. JM Eagle Inc.
15. Liang Chew Hardware Pte Ltd
16. Mitsubishi Chemical Infratec Co.Ltd. by Mitsubishi Chemical Group Corporation
17. Modern Technology Factory For Plastic
18. MrPEX Systems
19. Ningbo Sunplast Pipe Co. Ltd.
20. Popular Pipes Group of Companies
21. Prince Pipes And Fittings Ltd.
22. REHAU Vertriebs AG
23. Reliance Industries Limited
24. RIFENG Enterprise Group Co. Ltd.
25. Sekisui Chemical Co. Ltd.
26. Shamo Plast Industries LLC
27. Sioux Chief Mfg. Co. Inc.
28. Supreme Industries Limited
29. Truflo by Somany Impresa Group
30. Uponor Corporation
31. Wavin B.V.
32. Wienerberger AG