HDPE pipe & fittings
| Company | Website |
| Central Plastics Company | www.centralplastics.com |
| Connectra Fusion Technology | www.connectrafusion.com |
| Independent Pipe Products | www.hdpeftgs.com |
| North American Pipe Company | www.northamericanpipe.com |
| Oil Creek Plastics | www.oilcreek.com |