| Business | Phone |
| A-1 Tri-County Plumbing San Marcos 78666 | (512) 353-8656 |
| Allen Irrigation & Sprinklers 106 Manor Rd, San Marcos 78666 | (512) 392-1850 |
| Bluebonnet Plumbing Inc 2220 Oakwood Loop, San Marcos 78666 | (512) 396-4300 |
| Hay's County Drain Svc 922 W Hopkins St, San Marcos 78666 | (512) 395-7994 |
| Southwest Plumbing 925 Highway 80 Pmb 119, San Marcos 78666 | (512) 754-6677 |
| Sunshine Plumbing 700 Harmons Way, San Marcos 78666 | (512) 392-7777 |
| T Guenther Plumbing 1902 Post Rd, San Marcos 78666 | (512) 392-5953 |
| Texas State Plumbing Co 1517 Aquarena Springs, San Marcos 78666 | (512) 665-1872 |