Get your backflow test done by a tester your water district approves

Most water districts require backflow assemblies to be tested once a year, and they mail a notice when your test is due. Some districts also require a test after a device is installed, repaired, or relocated.

A backflow preventer is a valve assembly that stops water from flowing backward from your property into the public drinking water supply. They are typically required where a property has irrigation, a fire line, a pool, or certain commercial equipment that could contaminate the supply if pressure drops.

Many water districts only accept test reports from testers on their own approved list — certified, and registered with that district. A certified tester who is not on your district’s list can leave you with a report the district rejects. We verify every listed tester against the water agency’s own approved-tester list, and re-check monthly.

A standard residential test typically runs $75–$150, RPZ assemblies $125–$250, and commercial or multi-device sites more. Exact pricing depends on device type and your district’s reporting requirements — a free quote gets you real numbers from local testers.

The tester will tell you what failed and quote the repair — often fixable the same visit. After repair, the device is re-tested and the passing report is filed. Districts generally allow a short window to complete repairs before following up.

Usually yes — most testers file the test report directly with the district as part of the service. Confirm it when you book; it should be included, so there is no paperwork on your end.

Districts send reminders first, but continued non-compliance can lead to fines and ultimately water service shut-off, since an untested device is a contamination risk. If your deadline is close or passed, request a quote and mark it "ASAP" — testers often accommodate deadline jobs quickly.