| 1 | Poly-Cam | | USA |
| 2 | Q-TEK Inc. | | USA |
| 3 | Eastern Precast Company Inc. | | USA |
| 4 | Vidon Plastics Inc. | | USA |
| 5 | Blue Diamond Industries LLC | | USA |
| 6 | Lane Metal Products Co. Inc. | | USA |
| 7 | A.H. McElroy Sales and Service (Canada) Ltd. | | USA |
| 8 | Prescott Everett J. Inc. | | USA |
| 9 | Modern Precast Concrete | | USA |
| 10 | Poly Systems Inc. | | USA |
| 11 | Uponor ETI Co. | | USA |
| 12 | Polymer Science | | USA |
| 13 | Plastic Pipe & Supply Inc. | | USA |
| 14 | Chapman Electric Supply Inc. | | USA |
| 15 | Everett J. Prescott Inc. | | USA |
| 16 | Sewickley Construction Products Inc. | | USA |
| 17 | Scandia Plastics Inc. | | USA |
| 18 | Pena-Plas Co. | | USA |
| 19 | Thermacor Process L.P. | | USA |
| 20 | Argos Corp. | | USA |
| 21 | Georg Fischer LLC | | USA |
| 22 | Urecon Systems Inc. | | USA |
| 23 | Envirocon Systems Inc. | | USA |
| 24 | Freelin-Wade Co. | | USA |
| 25 | ComPlex Plastics Inc. | | USA |
| 26 | Plastic Products Inc. | | USA |
| 27 | InfraPipe Solutions LTD | | USA |
| 28 | Uponor Inc. | | USA |
| 29 | JM Eagle | | USA |
| 30 | Perma-Pipe Inc. | | USA |
| 31 | Hudson Extrusions Inc. | | USA |
| 32 | Hanna Rubber Company | | USA |
| 33 | Glue Machinery Corp. | | USA |
| 34 | Scheele Engineering Corp. – SECOR | | USA |
| 35 | Appalachian Piping Products Inc. | | USA |
| 36 | Oxford Plastics Inc. | | USA |
| 37 | Haviland Drainage Products Inc. | | USA |
| 38 | Industrial PEX LLC | | USA |
| 39 | Riverside Plastics Inc. | | USA |
| 40 | Composite Fluid Transfer LLC. | | USA |
| 41 | Polytubes Inc. | | USA |
| 42 | Bow Plumbing Group | | USA |
| 43 | PDM US Corporation | | USA |
| 44 | Superlon Plastics Company Inc | | USA |
| 45 | Polyethylene Technology Inc. | | USA |
| 46 | Texas Pipe Works Inc. | | USA |
| 47 | VersaProfiles | | USA |
| 48 | Plastifab Industries Inc. | | USA |
| 49 | Charter Plastics | | USA |
| 50 | ISCO Industries LLC | | USA |
| 51 | Solmax International Inc. | | USA |
| 52 | Advanced Drainage Systems Inc. | | USA |
| 53 | Oil Creek Plastics Inc. | | USA |
| 54 | Prinsco Inc. | | USA |
| 55 | Ideal Pipe | | USA |
| 56 | Polymeric Pipe Technology Corp. | | USA |
| 57 | Beaver Tool & Machine Co. Inc. | | USA |
| 58 | Total Containment | | USA |
| 59 | Special Service Plastic Company Inc. | | USA |
| 60 | Rinker Materials Corp. | | USA |
| 61 | Petroflex N.A. Inc. | | USA |
| 62 | Osi Plastics | | USA |
| 63 | CO-Ex Pipe Company | | USA |
| 64 | WL Plastics Corp. | | USA |
| 65 | IPEX | | USA |
| 66 | NewAge Industries Inc. | | USA |
| 67 | Xylem Inc. | | USA |
| 68 | Inline Plastics Inc. | | USA |
| 69 | Asahi/America Inc. | | USA |
| 70 | Ensinger Penn Fibre Inc. | | USA |
| 71 | Seelye Acquisitions Inc. | | USA |
| 72 | Calpex Plastics | | USA |
| 73 | Contech Engineered Solutions LLC | | USA |
| 74 | Pore Technology Inc. | | USA |
| 75 | New England Plastics Corp. | | USA |
| 76 | IPEX | | USA |
| 77 | Cash Acme | | USA |
| 78 | AGRU America Inc. | | USA |
| 79 | Custom Plastics Inc. | | USA |
| 80 | ALRO Products International | | USA |
| 81 | Teel Plastics Inc. | | USA |
| 82 | Flying ‘W’ Plastics Inc | | USA |
| 83 | SharkBite a Brand of Reliance Worldwide Corporation | | USA |
| 84 | Miller Plastic Products Inc. | | USA |
| 85 | PBS Plastics Inc. | | USA |
| 86 | Pipefusion Services Inc. | | USA |
| 87 | C.I. Thornburg Co. Inc. | | USA |
| 88 | Pipeline Plastics | | USA |
