Backflow Testing Services in Washington

Most municipalities in Washington require annual backflow prevention assembly testing. Some high-hazard connections may require semi-annual testing. Check with your local water authority for exact deadlines.

A standard residential test (PVB or DCVA) typically runs $90 to $200. RPZ assemblies cost $150 to $350 due to added complexity. Commercial sites with multiple devices can run $200 to $800+.

Yes. Nearly every municipality in Washington requires backflow tests to be performed by a certified tester. Certification generally involves training, an exam, and continuing education.