Backflow Preventer Installation in San Jose And Surrounding Areas, CA

Gomez Sewer and Drain installs backflow preventers for homes and businesses across San Jose, Campbell, Los Gatos, Palo Alto, Santa Clara, and Sunnyvale.

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  • Keeps contaminants and pollutants out of your home's drinking water supply
  • Brings your property into compliance with San Jose Municipal Water and California state requirements
  • Correct device sizing and placement reduces the risk of installation failure or future retesting issues
  • Protects your property from water service interruptions tied to non-compliance notices
  • Supports long-term water system integrity for both residential and commercial properties
A newly installed backflow preventer assembly mounted near a residential water meter on a San Jose property. The device is positioned on the customer side of the meter in compliance with local water district placement standards.

Expert Backflow Preventer Installation in San Jose And Surrounding Areas, CA

Backflow preventer installation protects your drinking water from contamination caused by reverse water flow. When water pressure drops suddenly, water can flow backward through your pipes and pull pollutants into your clean water supply. Gomez Sewer and Drain installs backflow prevention assemblies for residential and commercial properties across San Jose, Campbell, Los Gatos, Palo Alto, Santa Clara, and Sunnyvale. San Jose Municipal Water requires annual testing of all installed backflow prevention devices, and properties with irrigation systems or auxiliary water supplies may fall under additional local requirements. We assess your water line, identify the correct assembly type for your property, and install it to meet California state code and local water district standards. Properties throughout Santa Clara County range from older single-family homes to newer commercial builds, and each setup calls for a specific device type and placement. Once your assembly is in place, we walk you through what annual testing involves so you stay compliant year after year. Call Gomez Sewer and Drain to schedule your backflow preventer installation.

What's included

  • Keeps contaminants and pollutants out of your home's drinking water supply
  • Brings your property into compliance with San Jose Municipal Water and California state requirements
  • Correct device sizing and placement reduces the risk of installation failure or future retesting issues
  • Protects your property from water service interruptions tied to non-compliance notices
  • Supports long-term water system integrity for both residential and commercial properties
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Backflow Preventer Installation FAQ

Common questions about backflow preventer installation in San Jose and Surrounding Areas, CA.

San Jose Municipal Water requires backflow prevention assemblies on many residential and commercial water service lines. Properties with irrigation systems, auxiliary water sources, or flagged cross-connections are commonly required to have one installed.

After installation, your device must be tested annually to stay compliant with Santa Clara County water district requirements. Your water district will typically send a notice when your annual test is due.

Yes, we serve Sunnyvale and install backflow prevention assemblies for both residential and commercial properties. We size and place the device to meet your local water district's standards.

The right device depends on your water usage, system design, and local code requirements. Common options include reduced pressure zone assemblies and double check valve assemblies, and we assess your setup before recommending one.

A notice from your water company means a backflow preventer installation is required on your property. Contact Gomez Sewer and Drain to assess your water line and get the correct assembly installed to satisfy the requirement.

Yes, California requires a licensed contractor to install backflow prevention assemblies to meet state and local plumbing code. Unlicensed installation can result in failed inspections and non-compliance penalties.

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What Santa Clara County homeowners say.

4.5
32 Google reviews

Our experience was terrific. We had a medium sized job: replace the 90 year old iron sewer connection out rom back of home, down the driveway and out to the property line, and add a BBQ island (sink, garbage disposal, gas appliances) in the back yard. All together about 150' of sewer plus venting for the BBQ island, and water, gas to the BBQ. All work was done with permits. The quote included connection to the sewer under the home (not just at the exterior foundation where other quotes specified). Communication was excellent. They arrived when they said they would. Both the principals and the workers are very good people. Work went quickly when not waiting on inspections (schedule inspections early!). I judge a firm by how they handle problems. In this case, the rough plumbing inspector gave the OK for a certain island venting technique. The different final inspector said it must be changed, and Gomez plumbing just fixed it promptly, all within the original quote. Of course we waited for a second final inspection before getting the project closed (schedule early!) Gomez is now our go-to plumber.

Karl Pedersen Google review · July 2026

5/5 stars – I was very impressed with Gomez Sewer and Drain. Ivan & his entire crew are wonderful! They showed up on time as promised, squeezed me in next day on the schedule, handled the problem quickly & efficiently, cleaned up beautifully, and sent me the emailed invoice, all within 24 hours! I'm a realtor of 23 years and had a back up in a condo I'm selling. I had no time to waste and they came to my rescue quickly! They made me look good to my clients. I have them on speed dial and part of my trusted team. I highly recommend you put them on yours.

Sylvia Kalivitis Google review · March 2026

I was nervous about a clogged drain, but the team from Gomez Sewer and Drain showed up on time and were incredibly friendly and professional. They explained the problem, worked efficiently, and had my kitchen drain clean and flowing again in less than an hour. The plumber was courteous and answered all my questions about the repair, making me feel confident that the job was done right. I appreciate the timely service and will definitely call them again for any plumbing repair needs.

Angel Escamilla Google review · March 2026

FideI has solved numerous plumbing problems at my home over the past 5 years. He is responsive (really answers his phone!), prompt, kind, courteous and knowledgeable. He patiently answers all my questions and clearly explains the work needed. Fidel’s pricing is fair and honest. I highly recommend Fidel!

Syd Ogborn Google review · April 2026

I wanted to express my sincere gratitude to Fidel Gomez for his quick response and help! My daughter had a bit of a mishap by putting a toy down the toilet, and we were without a working toilet for nearly three months. A plumber came to fix it, but they initially suggested replacing the entire toilet. However, something just didn’t feel right, and I suspected the toy was still inside. To my surprise, when I called Fidel, there was a bubble bee inside! So, we owe him a huge thank you for his prompt assistance and for saving the day. He’s definitely my go-to plumber from now on.

Yesenia Garcia Google review · March 2026

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