Protecting Public Water Supplies from Contamination
Backflow occurs when pressure drops in the municipal water main, causing non-potable water, fertilizers, chemicals, or sewage to siphon backward into the drinking water supply. To protect public health, local water purveyors (including Rowland Water District, Golden State Water, and San Gabriel Valley Water) mandate annual certified backflow testing.
We are fully certified to test, certify, rebuild, and install all Reduced Pressure Principle (RP), Double Check Valve (DC), and Pressure Vacuum Breaker (PVB) assemblies.
Annual Testing & Official Paperwork Submission
Did you receive an annual backflow testing compliance notice? We perform calibrated differential pressure gauge testing, verify proper check valve seating and relief valve discharge, and submit official certification forms directly to your water district on your behalf.
Backflow Assembly Rebuilds & Cage Security
If your assembly fails the differential test due to mineral buildup on rubber discs or check springs, we disassemble and rebuild internal components using OEM repair kits. We also install heavy-duty steel security cages to protect outdoor assemblies from vandalism and brass theft.
Frequently Asked Questions
No guesswork, no mess, and strict adherence to upfront Written Estimates.
Call (626) 416-2212 to explain your symptoms directly to an experienced SGV plumber. Immediate dispatch for emergencies.
We arrive with specialized detection equipment to pinpoint the exact failure source before touching a tool.
You receive a comprehensive Written Estimate detailing parts, repair procedure, and timeline before work begins.
Work completed to California Plumbing Code standards. We test all lines thoroughly and leave your property spotless.
Why is annual backflow testing legally required?
California Administrative Code Title 17 mandates annual testing of all commercial and high-hazard backflow containment devices to prevent potable water contamination.
What happens if my backflow preventer fails the test?
We carry replacement check modules, relief valves, and rubber seal kits to repair and re-test the device during the same visit.
Do you provide an upfront Written Estimate for backflow repairs?
Yes. We deliver clear Written Estimates for testing, rebuilding, and replacing backflow prevention assemblies.