Backflow testing & repair in San Mateo, CA
BackflowCare tests backflow prevention assemblies in San Mateo (San Mateo County) and files the results with California Water Service – Bayshore District. Property owners are responsible for their backflow assemblies, which Cal Water requires to be inspected and tested every year by a certified backflow prevention assembly tester. If a device fails, we make minor repairs and file the passing retest with Cal Water Bayshore.
- County
- San Mateo County
- Water supplier
- California Water Service – Bayshore District
- Annual test
- Cal Water Bayshore: owner hires a certified tester
- Our price
- $199 per device ($25 off for new customers), or from $180/year on a plan
- ZIP codes
- 94401, 94402, 94403, 94404
Rules for new and replacement devices in San Mateo
- Only approved, testable backflow prevention assemblies may be installed at the water meter.
- Air gaps must also be inspected every year.
- The assembly installed must be the type Cal Water’s local cross-connection specialist specifies.
Source: Cal Water Bayshore backflow program (official page).
Installing or replacing a device takes a licensed plumbing contractor, usually with a permit. We can refer you to one we trust, test the new device once it’s in, and make minor repairs to existing ones.
Backflow questions from San Mateo property owners
Which water supplier serves San Mateo?
California Water Service – Bayshore District supplies water in San Mateo (ZIP 94401, 94402, 94403, 94404) and runs its backflow program.
Who tests backflow devices for Cal Water Bayshore customers in San Mateo?
Property owners are responsible for their backflow assemblies, which Cal Water requires to be inspected and tested every year by a certified backflow prevention assembly tester.