Backflow Prevention Assembly Installation & Annual Testing: Austin restaurant guide
Austin Water — Cross-Connection Control
What it is
Testable backflow assemblies protect the public water supply; they must be tested at installation and every year.
When a restaurant needs it
Whenever plumbing inspections require assemblies (e.g., chemical dispensers, irrigation, auxiliary water) — determined during the building permit process.
How to apply
Your plumber installs the assembly under a plumbing permit; a TCEQ-licensed tester registered with Austin Water tests it and files the report online in WEIRS.
Documents you’ll need
- Plumbing permit
- Test and Maintenance Report (filed by tester in WEIRS)
Good to know
Since July 25, 2022 paper test reports are not accepted — make sure your tester is registered with Austin Water and files in WEIRS.
Official source
Austin Water — backflow prevention overview · Austin Water — backflow tester information
Answer a few questions about your space and get every permit in order, with a timeline, a cost range, walkthroughs, and every application filled in for you to sign with Open.
Last reviewed 2026-10-06. Guidance only, not legal advice.