Irrigation Systems Backflow Preventer Installation Testing & Repair

Residential irrigation systems that are connected to pump systems, fertilizer injectors, or have elevated piping may still require a backflow preventer in addition to anti-siphon valves. The exact type of device required depends on the level of hazard, your state plumbing code, and local water authority requirements. As a county and local water authority certified backflow tester, and CA licensed contractor, Backflow Test Pros is committed to providing you the best irrigation backflow installation, testing and repair services at the industry's most competitive prices to help you avoid civil penalties and keep your water turned on.

Proper installation of a residential irrigation system backflow preventer is a legal requirement in California and a key element in ensuring public water safety. Residential irrigation systems that are connected to pump systems, fertilizer injectors, or have elevated piping may still require a backflow preventer in addition to anti-siphon valves. The exact type of device required depends on the level of hazard, your state plumbing code, and local water authority requirements.

Under California regulations, all backflow prevention assemblies that serve irrigation systems must be tested at least once a year by a California Department of Public Health-certified backflow prevention tester. This testing ensures the device is properly preventing the reversal of water flow, which could carry contaminants (like pesticides or fertilizers) into the public water system. The results of the test must be submitted to the local water utility—typically within 10 to 30 days of testing, depending on local rules.

If a backflow prevention device fails testing, repairs or replacements must be made immediately. The property owner is responsible for the repair, retesting and plumbing modifications required to maintain compliance. If a device fails the test, repairs or replacements must be made promptly by a certified backflow testing specialist and test results submitted to the local water agency within a specified timeframe, typically 10 days.

Backflow preventers are devices installed at specific points in the irrigation system (typically where the system connects to the home's water supply) that only allow water to flow in one direction—into the irrigation system. They shut off or redirect the flow if backpressure or backsiphonage is detected. In most jurisdictions, homeowners are required to install an approved backflow prevention device—such as a pressure vacuum breaker (PVB), double check valve assembly (DCVA), or reduced pressure zone (RPZ) device—at the point where the irrigation system connects to the potable water supply. Additionally, state and municipal regulations require that irrigation systems backflow prevention devices be tested annually by a certified backflow tester to ensure proper operation. Installation must also follow strict guidelines regarding height, orientation, and accessibility to allow for inspection and servicing. County Health Department and Municipality Backflow Testing Requirements: Los Angeles County Backflow Regulatory Guidelines Orange County Backflow Regulatory Guidelines

Failure to comply with these irrigation systems backflow installation, testing and repair regulations can result in fines, disconnection of service, or other enforcement actions. Homeowners may consult their local water authority or building department to ensure their irrigation system meets all applicable backflow prevention requirements.