Backflow Prevention Services

At Frank Bonetti Plumbing we have been repairing, installing, and certifying backflow prevention devices for over 35 years. A backflow prevention device is used to protect potable water from being contaminated downstream by irrigation products, chemicals, and other contaminates.  The state of California mandates that all backflow devices be tested annually. For our customers, we take care of notifying the water department of test results, installation dates, providing them with any requested information regarding your backflow preventer, as well as any other situations that may arise.

We have two service vehicles designed specifically for backflow prevention testing and repairs that are equipped with common repair parts and test equipment for emergency service. We install a wide variety of backflow devices to meet each individual customer’s need based upon size, type, and physical limitations. We can also provide vandal-resistant cages and thermal covers to help prevent freezing.

We offer after hour or weekend testing and repairs upon customer request. For more information on Backflow Prevention check out our FAQ section or contact us today to make an appointment.


20878 Rutledge Rd, Castro Valley, 94546

EAST BAY: 510.582.0934
TRI-VALLEY: 925.846.4626
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