| Kennedy Solutions/Ksi (Prescott, MI)
|
| Lamson Vylon Pipe (Beachwood, OH)
|
| Lasco Fittings Inc (Orlando, FL)
|
| Lewis Pipe Co (Ardmore, AL)
|
| Martin Rea International Inc (Dexter, MI)
|
| Modern Products Industries Inc (Beeville, TX)
|
| National Pipe & Plastics Inc (Vestal, NY)
|
| Nebraska Plastics Inc (Cozad, NE)
|
| Network Piping Inc (Coventry, RI)
|
| Non Metallic Resources Inc (Mobile, AL)
|
| North American Pipe Corp (Booneville, MS)
|
| North American Pipe Corp (Greensboro, GA)
|
| Northern Water Works Supply (Bismarck, ND)
|
| Northtown Co (Huntington Beach, CA)
|
| O'Brien (Redmond, WA)
|
| Oregon Plastic Tubing (Hubbard, OR)
|
| Petro Flex North America Ltd (Gainesville, TX)
|
| Phillips Driscopipe Inc (Hagerstown, MD)
|
| Plastic Pipe & Supply Inc (Cranston, RI)
|
| Plastic Tubing Industries Inc (Apopka, FL)
|
| Poly Pro (Pryor, OK)
|
| Poly Warehouse Inc (Stevensville, MT)
|
| Polystar Llc (Dalton, GA)
|
| Popp Binding & Laminating Inc (Lidgerwood, ND)
|
| Pre-Con Products Ltd (Simi Valley, CA)
|
