Here is a list of local approved backflow gauge testing companies.
| Company | Address | Telephone | |
| Fluid Meter Service Corp. | 7304 McNeil Drive, Suite 604 | Austin, TX 78729 | 512-258-3594 |
| Metro Irrigation Supply Co. | 6719 Shirley Avenue | Austin, TX 78752 | 512-458-5296 |
| SIMCO Electronics | 11110 Metric Blvd, Suite B | Austin, TX 78758 | 512-719-4045 |
| Test Gauge & Backflow Supply | 3321 Garden Brook Drive | Farmers Branch, TX 75234 | 469-206-3741 |