We test double-check and reduced-pressure-zone (RPZ) assemblies, handle the certification, and fix what fails — all under proper licensing so it counts.
When you need backflow testing
- You received an annual test notice from your water provider
- You just installed or moved an irrigation system
- Your assembly failed a freeze and was repaired
- You're selling a home with an irrigation system
- You're not sure your last test was ever filed
- A commercial property with compliance requirements
How backflow testing works
A licensed tester connects a calibrated gauge to your assembly and verifies that its check valves and relief valve hold pressure and open in the right sequence — the mechanisms that stop contaminated water from reversing into the potable supply. The test takes only a short visit, and we file the certified results directly with the City of Round Rock so you're compliant.
If the assembly fails, we can usually rebuild or replace it on the spot or shortly after, then re-test and file. We keep records so your next annual test is simple.
- Certified testing of double-check and RPZ assemblies
- Calibrated-gauge test of checks and relief valve
- Results filed with the City of Round Rock
- On-site rebuild or replacement of failed assemblies
- Re-test and re-certification after repair
- Records kept for easy annual renewal
What a backflow assembly actually protects
It's easy to see the annual test as red tape, but the assembly it checks does real work. Your irrigation system connects to the same water line you drink from. When pressure in the city main drops — a water-main break, heavy demand, or a fire hydrant opening nearby — water can reverse direction and siphon backward through your sprinkler lines.
Without a working backflow preventer, that reversed flow can pull fertilizer, pesticides, pet waste, and standing water sitting in your lawn straight back into the potable supply. The check valves and relief valve inside the assembly are what stop it, and they wear, stick, and crack over time — especially after a Central Texas freeze. That's why TCEQ Title 30, Chapter 344 mandates an annual test: it verifies the one device standing between your yard chemicals and your drinking water still works.
What Affects the Cost
We don't post fake prices — every job is different. Here's what goes into an honest, written estimate:
- Assembly type (double-check vs. RPZ)
- Number of assemblies on the property
- Whether repairs or replacement are needed
- Commercial vs. residential scope
- Freeze or age-related rebuild parts
Annual testing is a flat, affordable visit. Repairs, if the assembly fails, are quoted before we do them.
Why Round Rock Homeowners Choose Oakwood for TCEQ Backflow Testing & Certification
Plenty of contractors will quote this work. Here's what you get with a licensed local crew that does it every week across Central Texas:
- Testing is performed under proper licensing with a calibrated gauge, so your certification actually counts.
- We file the certified results directly with the City of Round Rock so you don't chase compliance paperwork.
- Failed assemblies — double-check or RPZ — are rebuilt or replaced on-site, then re-tested and re-filed.
- Licensed, insured, and BBB Accredited, with records kept to make each annual renewal simple.
TCEQ Backflow Testing & Certification Across Round Rock & Central Texas
We're based in Round Rock and provide tceq backflow testing & certification throughout Williamson and Travis counties and the surrounding region — from Round Rock, Pflugerville, Georgetown, Cedar Park, Hutto, and Brushy Creek. Because we know each area's soil, drainage, and code, the work is engineered for your specific property — not a generic template. See every community we cover on our service areas page, or call (323) 606-0255 for a free on-site estimate.
