What Is Backflow?
Backflow occurs when water flows in the wrong direction — backward from your building’s fire sprinkler system, irrigation system, or other non-potable source into the public drinking water supply. This can happen when there’s a sudden drop in water pressure from a main break, heavy demand, or firefighting activity. Without a backflow preventer in place, stagnant or chemically treated water from your fire protection system can contaminate the clean water supply that your neighbors, businesses, and community depend on.
Why You Need a Backflow Preventer
If your building has a fire sprinkler system connected to the municipal water supply, California law and your local water authority require a backflow prevention assembly on the fire service line. This is not optional. Water districts enforce this requirement and have the authority to shut off your water service for non-compliance. Beyond the legal requirement, backflow preventers protect public health — it’s one of the most important components in your fire protection water supply chain.
Annual Testing & Certification
Backflow prevention assemblies must be tested annually by a certified backflow tester. During the test, we verify that the check valves and relief valve are functioning correctly and that the assembly is preventing backflow as designed. After testing, we submit the certified test report directly to your local water authority on your behalf. We also track your testing schedule and send reminders so you never miss a deadline.
Installation
We install double check valve assemblies (DCVAs) and reduced pressure zone assemblies (RPZs) on fire service lines, domestic water lines, and irrigation connections. Every installation is sized and configured to meet the requirements of your local water district and the degree of hazard at your property. We handle permitting, coordinate with the water authority for inspection, and make sure the assembly is accessible for future testing and maintenance.
Repair & Replacement
Failed test results, leaking relief valves, stuck check valves, and freeze damage are the most common backflow preventer issues we see. When an assembly fails its annual test, it needs to be repaired and retested before certification can be issued. We carry common repair kits and replacement parts to handle most repairs on-site the same day. If an assembly is beyond repair, we’ll replace it and get you recertified as quickly as possible.
What Happens If You Don’t Test?
Failure to test your backflow preventer annually can result in violation notices, fines, and ultimately disconnection of your water service by the local water district. It can also void your fire protection system’s compliance status and create liability issues with your insurance carrier. The test itself is quick, affordable, and far less expensive than the consequences of skipping it.