What Is Your Situation?
Tap what applies.
What Is Backflow Testing?
Backflow assemblies protect the public water supply from contamination if pressure drops or reverses. Testing proves the check valves and relief valves work. One testing company states it directly: backflow testing is not a scam, it is needed to protect the water supply.
When Backflow Testing Is Required
SAWS monitors annual testing of backflow assemblies and says annual testing is required by Chapter 24 of the City of San Antonio’s Plumbing and Fuel Gas Code. Common assemblies are on irrigation systems, commercial buildings and fire lines.
Testing by Qualified Professionals
Backflow tests must be done by a qualified tester. Ask for credentials and verify the license at tsbpe.texas.gov.
- Ask for the tester’s license and certification
- Ask how results are reported to SAWS
- Ask whether repair and retest are included
- Get the cost in writing
What Happens During a Test
- Locate and accessWe confirm the assembly type and shut-off valves.
- Test with a calibrated gaugeWe test check valves and the relief valve.
- Report resultsWe record results and file the report.
- Repair if neededIf it fails, we give a written repair estimate and retest.
Failed Backflow Tests and Repairs
Replace internal parts
Seals, springs and check discs are common failure points.
Replace the assembly
Needed if the body is cracked or repairs are not cost-effective.
What Affects Backflow Testing Cost
Residential and commercial rates differ, and some local irrigation companies advertise flat rates that include paperwork. Treat those as general ranges. We give a written estimate.
| Factor | Effect |
|---|---|
| Residential or commercial | Size and number of assemblies |
| Paperwork | Filing with SAWS |
| Repair and retest | Extra if it fails |
| Access | Buried or hard-to-reach assemblies |
Seasonal Backflow Care
Spring
Test before irrigation season.
Summer
Check for leaks during heavy watering.
Fall
Test before notice deadlines.
Winter
Protect exposed assemblies from freezing.
Checklists
Before we arrive
· Tip: screenshot this list.
Ask any tester
· Tip: screenshot this list.
Myths vs. Facts
| Myth | Fact |
|---|---|
| Backflow testing is a scam. | It protects the public water supply. |
| Only commercial sites need it. | Irrigation systems on homes can need it too. |
| Any plumber can test. | A qualified tester is required. |
Our Estimate Process and What to Expect
- Call or text a photoTell us what you see. We tell you honestly whether it needs a visit and how urgent it is.
- Inspect and testA licensed plumber checks backflow testing and explains findings in plain language.
- Written estimateScope, materials, permits and exclusions in writing. No work starts without it.
- You approveYou choose. We never start before you say yes.
- Work, test, clean upWe finish, test, clean up and walk you through what changed.
Ask for our license number and verify it at tsbpe.texas.gov. Getting two or three written quotes is smart. Compare scope line by line, not just the total.
Backflow Testing FAQs for San Antonio Homeowners
Is annual backflow testing required for my property?
SAWS says annual testing of backflow assemblies is required under Chapter 24 of San Antonio’s Plumbing and Fuel Gas Code. Confirm your property with SAWS.
Who can test a backflow assembly in Texas?
A qualified, licensed tester. Verify credentials at tsbpe.texas.gov.
What happens if a preventer fails testing?
It is repaired or replaced and retested, and the passing result is reported.
How much does a backflow test cost?
It varies. Ask for the total including paperwork and any retest.
Where is my backflow assembly?
Often near the irrigation system or water meter.
Do I need testing for a sprinkler system?
Often yes, if it connects to the public water supply.
About This Page and Our Sources
- San Antonio Water System — service, pressure, backflow program, 210-704-SAWS (7297)
- Texas State Board of Plumbing Examiners — verify any plumber’s license
- City of San Antonio Development Services — permit requirements
Compliance rules come from SAWS and the City of San Antonio. Confirm your requirements with SAWS. Costs and requirements vary by property. Nothing here replaces an on-site inspection by a licensed plumber. Stark is not affiliated with SAWS, CPS Energy or any manufacturer named here.
