TSBPE #M-43891
Backflow Prevention Testing & Installation in Austin — Required Annual
Austin Water’s cross-connection control program requires every property with a fire system, irrigation system, pool fill, or boiler tie-in to install and annually test a backflow prevention assembly. Test reports must be filed with Austin Water within 30 days or the property risks a notice of violation. Austin Plumbing Pros has certified Backflow Prevention Assembly Testers (BPAT licensed) on staff. Annual test: $145. Installations from $585.
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Austin Water specifically enforces cross-connection control around the Onion Creek flood zone and any lot with irrigation — the program got teeth after a 2019 contamination incident. If you’re in the 78744, 78747, or 78745 ZIPs with an in-ground irrigation system, your annual test is non-negotiable; the utility audits these ZIPs more aggressively than the rest of the city.
Why Austin Requires Backflow Prevention
Every connection where a non-potable system (irrigation with chemicals, a pool with chlorine, a boiler with treatment) ties into the city water supply is a backflow risk. If city pressure drops (a main break, a fire-hydrant draw), water can flow backward from the non-potable system into the city main. Austin Water’s cross-connection program prevents that with a mechanical assembly — typically a Reduced Pressure Zone (RPZ) device or Double Check Valve Assembly (DCVA) — that physically blocks reverse flow. The program is mandated by EPA and TCEQ and isn’t optional.
What Triggers The Requirement
You need a backflow assembly if you have: an in-ground irrigation system, a swimming pool with an automatic fill, a hot water boiler, a fire suppression system, a commercial kitchen with chemical dispensing, or a medical/dental office. Austin Water sends a notice within 60-90 days of receiving the building permit for any of these. If you bought a home with one of these and never received a notice, you’re still required to test annually; the obligation transfers with the property.
The Annual Test — What It Looks Like
A certified tester (BPAT license) arrives with a calibrated differential pressure gauge. We isolate the assembly, run the test on each check valve and the relief valve in sequence (15-20 minutes), and submit the digital test report to Austin Water within 24 hours. If the assembly passes, you’re cleared for another 12 months. If it fails, we quote the repair (usually a check valve rebuild kit, $145-$245). Annual test fee: $145.
Common Assemblies And What They Cost
3/4-inch DCVA (typical residential irrigation): $585 installed. 1-inch RPZ (high-hazard residential, pool fill): $785 installed. 2-inch RPZ (commercial irrigation, fire system): $1,650 installed. All include the assembly, isolation valves, test ports, and the initial Austin Water test submission. Site-built mounting box (most are required above-grade in a freeze-protected enclosure): $145-$245 additional.
What Happens If You Don’t Test
Austin Water issues a notice of non-compliance after 30 days past the annual due date. After 60 days, a second notice. After 90 days, Austin Water can disconnect your water service. They almost never go to disconnection — but they do flag the property for the next utility-bill audit, which can show up on title work. The $145 annual test is the cheap insurance.
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Frequently Asked Questions
Do I really need a backflow test every year?
Yes if you have an irrigation system, pool fill, fire system, or other cross-connection. Austin Water program is mandated; testing is annual.
How much does the annual test cost?
$145 per assembly. We submit the test report to Austin Water within 24 hours.
What if my assembly fails the test?
We quote the repair on the spot. Usually a check valve rebuild kit ($145-$245). Sometimes the assembly is past life and replacement is the right call ($585-$1,650 depending on size).
Can my regular plumber do it?
Only if they’re BPAT-certified (Backflow Prevention Assembly Tester) and licensed by TCEQ. Our certified testers are on staff.
Do new construction need a backflow device?
Yes — Austin building permits for any system with a cross-connection require the assembly to be installed before final inspection.
How long does the install take?
Residential DCVA or RPZ: 2-3 hours including pressure test. Commercial: half-day to full-day depending on system size.
What’s the difference between DCVA and RPZ?
DCVA is two check valves; used on low-hazard cross-connections. RPZ adds a relief valve between the checks; required for high-hazard (pool, boiler, fire system) installations.
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About Austin Plumbing Pros
Austin Plumbing Pros is the city’s premium master-licensed plumbing operation, run out of three depots — South Slaughter Lane, Anderson Mill, and East Riverside — so a TSBPE-licensed plumber is on-site for most calls within 35-60 minutes of dispatch anywhere inside the 130 loop. Every emergency truck carries a Master or Journeyman as the lead tech (never apprentice-only), the standard inventory truck stocks Rheem, A.O. Smith, and Bradford White water heaters plus Moen, Delta, and Kohler cartridges and aerators, and we pull permits with the City of Austin, Travis County, Williamson County, Round Rock, Pflugerville, Cedar Park, Leander, Georgetown, and Manor jurisdictions every business day. We’ve spent enough hours pulling cast iron out of pre-1980 Hyde Park backyards and chasing slab leaks under 1990s North Austin builds that we know which symptom is the easy fix and which is buying time. When you call, a real Austin dispatcher picks up. When the truck arrives, the Master plumber writes you a flat-rate estimate before any drywall or pipe is touched. When the job’s done, you get a two-year parts-and-labor warranty. That’s the entire operation in three sentences.
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