| Business | Phone |
| Harlow Filter Supply Inc 9408 North Loop E, Houston 77029 | (713) 674-4309 |
| H & P Systems 7715 Salge Dr, Houston 77040 | (713) 937-4421 |
| Progressive Product Marketing 14375 Sommermeyer St, Houston 77041 | (713) 896-1818 |
| Pro-Tec Equipment Co 3535 Briarpark Dr 207, Houston 77042 | (713) 952-7590 |
| Advance Technology Products 14135 East Fwy, Houston 77015 | (713) 450-5990 |
| Chemflo 6823 Fulton St, Houston 77022 | (713) 691-2800 |
| Devon Industries 5315 Fm 1960 Rd W # D, Houston 77069 | (281) 893-2003 |
| Filter Products 5336 Prudence Dr, Houston 77045 | (713) 433-6497 |
| Filter Specialist Inc 3500 S Richey St 360, Houston 77017 | (713) 944-7952 |
| Knight Filter Corp 10885 Fallstone Rd, Houston 77099 | (281) 933-5363 |
| Knight Filter Corp Houston 10885 Fairstone Dr, Houston 77064 | (281) 561-9077 |
| Johnson Screens 5002 Beechnut St, Houston 77096 | (713) 661-9483 |
| Jamison Products 6417 Cunningham Rd, Houston 77041 | (713) 466-6951 |
| J T Hydraulics & Svc Co 1511 Bingle Rd B2, Houston 77055 | (713) 984-9727 |