Backflow repairs in Hayward, CA
In Hayward (Alameda County), City of Hayward Water System tests backflow devices itself, so you don’t need to hire a tester. BackflowCare makes minor repairs when a device fails.
- County
- Alameda County
- Water supplier
- City of Hayward Water System
- Annual test
- City of Hayward: the supplier tests
- ZIP codes
- 94541, 94542, 94544, 94545
What City of Hayward requires in Hayward
- After a device is moved, repaired or installed it must be tested immediately and the results submitted.
Source: City of Hayward backflow program (official page), checked October 17, 2026.
Rules for new and replacement devices in Hayward
- Hayward names reduced pressure (RP) assemblies, pressure vacuum breakers, double check assemblies and air gaps as backflow methods; double checks are limited to non-health hazards.
- Assemblies may be required as close as practical to the water meter.
- Moving or replacing a device needs prior approval from the City’s Cross-Connection Control Specialist.
Source: City of Hayward 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 Hayward property owners
Which water supplier serves Hayward?
City of Hayward Water System supplies water in Hayward (ZIP 94541, 94542, 94544, 94545) and runs its backflow program.
Who tests backflow devices for City of Hayward customers in Hayward?
The City of Hayward schedules and conducts backflow assembly tests itself and notifies the owner if a device fails.