Backflow Testing, Repair, and Installation
CMS Plumbing is fully certified to perform backflow prevention testing, repair, and installation for all sizes and types of systems. Our team ensures that your property’s water supply remains safe, compliant, and protected from contamination.
A backflow prevention device is essential for keeping clean water separate from potential pollutants that can flow backward into the public water system due to pressure changes. Without proper prevention, harmful substances—such as chemicals, fertilizers, or bacteria—can enter the potable water supply, posing serious health risks.
To maintain safety and comply with local regulations, annual backflow testing is required. CMS Plumbing provides professional testing services to verify that your device is functioning correctly and meets all code requirements. If repairs or replacements are needed, our licensed technicians handle everything quickly and efficiently.
We also supply and install protective cages and enclosures to safeguard backflow assemblies from vandalism, theft, and environmental damage, extending the life of your system.
With CMS Plumbing, you can rely on expert service, certified technicians, and a commitment to water safety and compliance for both commercial and residential properties.
Top-Rated plumbers
In the Bay Area
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Free & Detailed Estimates ProvidedWe offer upfront quotes before we get to work.
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Emergency After-Hour ServiceWhen you need plumbing fast, don't hesitate to call!
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Over 40 Years of ExperienceWe take pride in being experts at all things plumbing.
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We Get the Job Done Right the First TimeExceeding your expectations is our #1 goal.
We Let out customers do the talking
Hear Their Thoughts on CMS Plumbing!
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"These guys are the best - professional, skilled, affordable and no BS!"
We are so grateful that Sam was able to come out and fix the water pressure to the appliances in our home. He and Mark were able to pinpoint the problem and Sam fixed it the same day! This is just one of several examples where CMS Plumbing has really helped us. These guys are the best - professional, skilled, affordable and no BS! I trust them and am looking forward to having them come back to do more work for us. Best of all they are really good people who honestly care about the work they do. Thanks guys and thank you CMS.⭐️⭐️⭐️⭐️⭐️
- Justin T. -
"Awesome job"We recently had an out of hours plumbing issue tended to by CMS Plumbing. The operator taking our call was able to help us define the issue and connect us with Chris. He did an awesome job fixing our pinhole leak.- Sally Clark
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"Enthusiasm and expertise"Scotty was great. Great attitude. Very respectful and professional. Wore boot covers to keep carpet clean and put down tarp to further keep area clean. They took our frustrating situation and made it good in very little time. He even had to crawl under the house( not much room under there) to preform the repair and still did it with enthusiasm and expertise. You could tell he knew what he was doing. I will use CMS anytime I need a plumber and would highly recommend them- Glenn Sgarlato
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"AMAZING SERVICE"After having our gas turned off in the middle of the cold spells of winter, for a gas leak, Sam, Mark, and Luis took care of an unfortunate situation in a very timely and professional manner. We really appreciate them getting the gas back on quickly as they could, for our family!- Megan
