| 1 | Quality Pipe Products Inc. | | USA |
| 2 | Warsaw Engineering & Fabricating Inc. | | USA |
| 3 | Glyne Manufacturing Co. | | USA |
| 4 | C.I. Thornburg Co. Inc. | | USA |
| 5 | Service Components Inc. | | USA |
| 6 | DBJ Corporation | | USA |
| 7 | Olsen Tool & Plastics Inc. | | USA |
| 8 | LP International | | USA |
| 9 | PDM Steel Service Centers Inc. | | USA |
| 10 | The Pipe Yard | | USA |
| 11 | ICSE | | USA |
| 12 | BHM Pipe&Supply Inc. | | USA |
| 13 | Interstate Metals | | USA |
| 14 | Youngstown Tube Company | | USA |
| 15 | Drake Communication Products | | USA |
| 16 | Morris Coupling Co. | | USA |
| 17 | A-1 Alloys | | USA |
| 18 | Reliable Source Inc. | | USA |
| 19 | Component Hardware Group | | USA |
| 20 | Micromold Products Inc. | | USA |
| 21 | PEP A Ryan Herco Flow Solutions Company | | USA |
| 22 | Mueller Streamline Co. | | USA |
| 23 | Southeast Texas Industries Inc. | | USA |
| 24 | Merit Brass Co. | | USA |
| 25 | Midwest Control Products Corp. | | USA |
| 26 | JM Eagle | | USA |
| 27 | Valiant Steel | | USA |
| 28 | Cal Pipe Industries | | USA |
| 29 | Georg Fischer LLC | | USA |
| 30 | InfraPipe Solutions LTD | | USA |
| 31 | K & K Enterprises Inc. | | USA |
| 32 | Watts Water Technologies Inc. | | USA |
| 33 | Rockwell Industries International Corp. | | USA |
| 34 | Cooney Brothers Inc. | | USA |
| 35 | Industrial Supply & Rental | | USA |
| 36 | United Pipe Nipple Company | | USA |
| 37 | MRC Global | | USA |
| 38 | Steven M. Hain Co. Inc. | | USA |
| 39 | Island Fitting | | USA |
| 40 | Stainless Specialties Inc. | | USA |
