Drain + Sewers

Backflow Preventer

Our backflow preventer keeps things on track with style!

Keep Your Plumbing Flowing In The Right Direction

Backflow Preventer Installation

Backflow is when used water flows back into the water supply. This contamination can be harmful to your home and its plumbing, drains and sewer systems, leaving it vulnerable to leaks and corrosion. Most importantly, however, a contaminated water supply could be dangerous to your health. That’s why it’s crucial to utilize backflow repair and replacement services.

Gotelli Plumbing offers backflow services to identify where your plumbing systems are dealing with backflow problems. Once we locate the problem, our expert backflow repair and replacement services will get your system back in shape! Give us a call to get started.

a backflow preventer system installed in the grass outside

What Is Backflow?

Simply put, backflow occurs when the conditions of the water system cause water to flow in the wrong direction, back into the plumbing systems rather than out of it.

There are two kinds of backflow: back-pressure and back-siphonage.

Back-pressure occurs when water is forced to flow in the opposite direction due to pressure downstream increasing the system pressure.

Back-siphonage occurs when a sudden drop in pressure causes the suction of used or contaminated water back into the water supply.

For example, let’s say a homeowner uses pesticides in their lawn, then waters the yard and water pools around a sprinkler head. Then the fire hydrant down the street is used, causing a sudden drop in water pressure. The water around the sprinkler head can be sucked back into the potable (public) water supply, contaminating the community’s drinking water supply.

Backflow Preventer Installation In Marin and Sonoma Counties

In order to stop used water from reentering your plumbing, a backflow preventer can be installed on your home’s pipes. It prevents water from being siphoned or forced back into the potable water supply.

3 Types Of Backflow Preventers

There are several different types of backflow preventers, ranging in design, cost, reliability and more. Understanding each kind of backflow preventer is important if you’re looking to have one installed in your home. While your plumber will help you determine which of these options is best for you, the final decision is yours.

Pressure Vacuum Breaker Assemblies

The most commonly used assembly is the pressure vacuum breaker, which has the simplest design — making it easy to install, maintain and repair. This assembly prevents back-siphonage only, not back-pressure.

Reduced Pressure Zone Assemblies (RPZ)

RPZs are the most complex and expensive backflow preventers but, when functioning properly, are the most reliable. This type of backflow preventer can be installed either above or below ground, although above-ground is preferred, and protects against both back-siphonage and back-pressure.

Double-Check Valve Assemblies (DCA)

Double-check valve assemblies are the best option for underground or indoor installations. DCAs are the most commonly approved underground backflow preventer, although they can also be installed above ground depending on the installation code for your area.

Count On Gotelli Plumbing

Many homeowners aren’t sure if they need or already have a backflow preventer in their plumbing system — that’s okay, we can help! Whether you need a backflow preventer, repair or replacement — or simply aren’t sure — give Gotelli Plumbing a call.

We’ve been operating in the North Bay area for over 30 years, so we know a thing or two about the backflow needs of our customers. One of our experienced, professional plumbers will inspect your plumbing and help you determine the best course of action.

Contact us today to speak to a service representative or to begin a service request.

Other Services We Offer
Jason is ultimate professional and very good
Explained everything. Gave honest and. Experienced recommendations. Trouble shot a non typical install. Added value and options. Patient. Clean. Neat and efficient

Well done
I never met you, but I believe you're caring in that you honestly provided me with an estimate I am unable to meet since I am a 73 yo on a fixed income. And to replace a washer or a bib for $413. is other worldly for me. Thanks
I recently hired Gotelli Plumbing to install an in-wall toilet and shower, and I couldn’t be happier with the results. Their team, Tom Robertson & apprentices, was professional, punctual, and highly skilled. They took the time to explain the process, kept the work area clean, and completed the job efficiently. The attention to detail was impressive. I highly recommend them for any plumbing project; great service and quality workmanship!
They we're awesome!Squeezed me in last minute and the tech was informative, and up front with costs. Highly recommend!
Sam was quick and efficient and explained things well. Steve came today and did some work. He’s very good at explaining options and costs.
Good, reliable and consistent work
I’m so grateful for Joey’s quick and professional help! He found a leak that could’ve caused serious damage and fixed it fast. Super knowledgeable, honest, and easy to work with—highly recommend!"
a good experience
Fernando was very friendly, professional, and completed the project in a timely manner. My only disappointment, I thought the cost to do the work was excessive for time spent. Maybe and estimated “not to exceed “ would have been more acceptable.
Gotelli Plumbing did a great job changing out 3
25 year-old toilets with fresh new Toto’s and new supply lines! Jason was terrific in explaining Options and pricing and we were super happy with the service and the two-year warranty. We refer Gotelli plumbing to all of our clients for their competitive pricing and excellent service!
Joey was incredibly kind, thoughtful, and knowledgeable. It was great having an expert on my team helping navigate my specific plumbing situation.
Outstanding service and reasonable price. Was able to book an appointment quickly and was on time. Jason my tech was very knowledgeable, professional, had the tools, parts and fixed everything right the first time. Also checked all plumbing to ensure there were no other issues. Would highly recommend.
Fantastic service !
Joey was friendly and very informative. Gave me straight answers and suggestions without any pressure or bs.
I appreciated the honest conversation.
I was extremely happy Gotelli plumbing could be available the same day I called. They communicated in advance of their visit. Fernando was friendly & professional. Also a nice touch to see the picture of the technician before he arrives. Big thanks to the Gotelli team.
A bit pricey but excellent service. The serviceman was efficient, professional and friendly.
Gotelli plumbing is the best
Tom Robertson was very professional and explained what needed to be done. I have been a customer for years and find their work to be top notch
Joey was able to get out to us in the morning and inspect the leak we had outside the house. He figured out how to stop the leak while we figure out the next steps for repair. He also gave us some ideas for work arounds in the meantime. He did a quick inspection of the house and pointed out a few things that could be changed, but since no issues at the moment, not pressing. All and all, happy with the result.
Love the fact that Joey was able to get here on short notice and that he explains everything as he’s going along. He answered all of my questions and is extremely courageous
Steve and Sebastian were great. Professional and courteous. They spotted the problem immediately and fixed it completely!
Santa Rosa, CA
3200 Dutton Avenue, #423
Santa Rosa, CA 95407
San Rafael, CA
21 Lovell Ave
San Rafael, CA 94901
97604453-4e7b-4120-900b-17b20c3fba84