If you own or manage a commercial property, an HOA or a home with a testable irrigation backflow assembly, you have probably received a notice asking for an annual backflow test. It is easy to put off, but water purveyors take these notices seriously because backflow can contaminate the public drinking water supply.
Here is a plain-language overview of what a backflow preventer does, how testing works and how to keep your property in compliance without stress.
Backflow happens when water flows in the wrong direction, from a property back into the public main. It can be caused by back-pressure, such as a pump or boiler, or back-siphonage, such as a sudden pressure drop during a main break or firefighting.
Reduced pressure zone (RPZ) assemblies protect against high hazards. Double check valve assemblies (DCVA) cover lower hazards and fire lines. Pressure vacuum breakers (PVB) are common on irrigation systems.
Testable assemblies on commercial buildings, restaurants, medical offices, HOA irrigation, fire sprinkler systems and many residential irrigation systems must be tested at least once a year and after any repair or relocation.
A certified tester connects a calibrated differential gauge to the test cocks and checks each check valve and relief valve against its required pressure. Water is off for only a few minutes.
A failed test usually means a worn check valve, a fouled seat or a leaking relief valve. The assembly is rebuilt with new rubber parts and retested. Replacement is only needed for damaged or obsolete devices.
Sun, heat and occasional freezing nights crack rubber parts and plastic test cocks. Insulated, locking enclosures extend the life of assemblies and deter theft of brass components.
Keep a list of every assembly on your property with its size, type and serial number. A testing company that tracks your dates and sends reminders makes compliance routine.
Our licensed plumbers handle backflow testing & prevention across Las Vegas, Henderson and North Las Vegas. Call (702) 555-0148 or request a free estimate.