Backflow is what happens when contaminated water reverses direction and flows backward into your clean drinking-water supply. It usually occurs during a sudden pressure drop, like a water main break or heavy fire-hydrant draw, which Houston sees often enough that the city takes backflow seriously. The City of Houston Public Works requires that backflow prevention assemblies be tested annually by a licensed, certified tester, and Houston Flow Plumbing has been keeping homes and businesses compliant since 2010.
Our Master Plumbers carry the state Backflow Prevention Assembly Tester (BPAT) certification, so we can install, repair, and certify your device and file the report directly with the city. We work on the full range of assemblies you will find across Houston properties:
- Reduced Pressure Zone (RPZ) assemblies, the standard for higher-hazard commercial and irrigation connections
- Double Check Valve (DCV) assemblies for lower-hazard residential applications
- Pressure Vacuum Breakers (PVB) common on lawn irrigation systems
- Atmospheric Vacuum Breakers and hose-bibb vacuum breakers
Backflow protection matters most where clean and potentially contaminated water could mix. That includes homes with irrigation systems, swimming pools, or water-using equipment, and nearly every commercial property. If you run a restaurant, medical office, or any business in our commercial plumbing wheelhouse, the city almost certainly requires an annual test. Backflow work also pairs naturally with our water filtration systems and repiping services, since protecting water quality is the common thread.
The annual test itself is quick. A certified tester isolates the assembly, checks the valves and relief mechanism under pressure, confirms everything seats correctly, and documents the results. If a valve or seal has failed, we show you flat-rate pricing before any repair and can usually rebuild or replace the device the same visit. We then submit the passing report to the City of Houston so you stay compliant and avoid violation notices. If your device fails inspection or freezes during a rare hard freeze, our 24/7 team can respond, and any backup-related issues tie into our sewer line services.
A standard residential backflow test in Houston typically runs $75 to $150. Installing a new assembly ranges from roughly $300 for a simple PVB to $900 or more for a larger RPZ device, depending on size and complexity. We track your test due date and remind you before it expires, so compliance is one less thing on your plate. Financing through GreenSky is available on larger installations.