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
-
Free & Detailed Estimates ProvidedWe offer upfront quotes before we get to work.
-
Emergency After-Hour ServiceWhen you need plumbing fast, don't hesitate to call!
-
Over 40 Years of ExperienceWe take pride in being experts at all things plumbing.
-
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!
-
"Reliable reliable reliable!"They do great work and always in a timely fashion.- Claire
-
"On top of all that, they have probably one of the lowest hourly rates out there."Excellent service, and you can't beat the price.- Will
-
"Cory came in, quoted and it was done as soon as it started."Didn't disrupt my work day and it got one more thing off of my 'to do' list.- Sara
-
"Best plumbers in the bay!"
Best plumbers in the bay!
- Anonymous