| Business | Phone |
| Kemper Valve & Fittings Corp 5650 Guhn Rd 110, Houston 77040 | (713) 462-1665 |
| Ktm Products Inc 9700 W Gulf Bank Rd, Houston 77040 | (281) 492-8800 |
| Atlas Fluid Controls Corp 9206 Emmott Rd # A, Houston 77040 | (713) 666-2190 |
| Automated Valve & Control 6926 Stearns St, Houston 77021 | (713) 747-3172 |
| Buffalo Flange Inc 9202 Lambright Rd, Houston 77075 | (713) 943-9600 |
| Coffer Corp 3900 Blossom St, Houston 77007 | (713) 868-4424 |
| Gilmore Valve Co 1231 Lumpkin Rd, Houston 77043 | (713) 468-8778 |
| Maass Flange Corp 6202 Lumberdale Rd, Houston 77092 | (713) 329-5500 |
| Norriseal 11122 W Little York Rd, Houston 77041 | (713) 466-3552 |