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Backflow Testing in San Francisco 

Reliable Plumbers in San Mateo County 

No one likes the idea of contaminated wastewater entering their clean supply. However, without a reliable backflow prevention system, this is a very real possibility. Even high-quality preventers need maintenance, however, and this is something our team can help you with. Scheduling backflow testing in San Francisco will provide you with peace of mind that your system works as it should. Here at One Source Plumbing, we can provide fast and effective answers. Get in touch for prompt testing at any residence in San Mateo County.

To learn more about when to arrange for testing, contact our team now at (415) 993-5090.

How Does Backflow Prevention Testing Work?

Backflow occurs when the pressure of the main water line suddenly becomes less than the pressure flowing downstream. Because the source of this downstream flow is non-drinkable, the backflow of waste will contaminate clean water as well. 

Some of the causes of this drop in pressure include:

  • A main line bursting from a severe clog or shift in the soil
  • A sudden increase in how much water is being used
  • Pipes freezing during the winter
  • Use of a fire hydrant

The purpose of a backflow preventer is to halt any dirty water or waste going back up the fresh supply, but these systems cannot last forever. This is why it is necessary to schedule regular backflow testing. Every device comes with essential dates, showing the maximum time that can pass before testing. During the test, a team of professionals will check the device’s ability to withstand the intense levels of pressure. If any parts are malfunctioning, they will replace these immediately.

Why Do You Need to Install & Maintain a Backflow Preventer?

A common question that many residents have is why they need to pay for a backflow preventer to stop water from infecting the common line. Some wonder why the municipality does not simply pay for the preventer instead. It is important to remember that whenever there is a problem with backflow, the issue has occurred down by the unique property. Perhaps a family is experiencing a clog on account of improperly dropping foreign objects down the drain. The backflow from this mistake would affect the entire community, not just one household. 

Additionally, it is ultimately the accumulation of everyone’s taxes that gets absorbed by the municipality. This would mean that you and all your neighbors would be paying for one person’s mistake. Therefore, rather than everyone contributing to each other’s backflow preventers, it is much simpler for each family to purchase their own. It also makes sense for every household to maintain its own system. If one individual is negligent in testing and upkeeping their backflow preventer device, the whole community should not suffer. To learn more about installing a crucial preventer device at home, speak to our expert technicians at One Source Plumbing. 

For more detailed information, call one of our team members at (415) 993-5090, or just speak to our team online about backflow testing in San Francisco.


Our Difference

  • Quality Service All Around
  • Experienced Technicians
  • 100% Satisfaction Guaranteed
  • Free Estimates
  • Same Day Appointments
  • Highly recommend!

    "My Sewer was clogged up with roots, Mo and Juan Showed up within an hour and were able to deal with it within an hour they were great."

    - Melvin B.
  • Thank you!!

    "This is my first time ever leaving a review. I am so thankful for One Sources help at 4:30 am I had to share it. I woke to water coming from the kitchen upstairs through the lights in my downstairs bathroom."

    - Josie A.
  • Highly recommend and Mo will always have my business!

    "What can I say that hasn't already been said? Mo and his team are the BEST! I woke up to water pouring out of my water heaters overflow pipe and pan and didn't even know where to start."

    - Miss M.
  • Job well done!

    "Mo and his team do great work. He came to do the estimate and were clear about what needed to be done and the options we had. We repiped our victorian home and it was done perfectly."

    - Brian N.
  • Grateful!

    "Mo came to the rescue when boatloads of water started backing up into our first floor at 11pm last night. So appreciated his patience, the info he provided and the extra mile he went to get us help with our situation."

    - Leslie S.

Contact Us Today!

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We are more than happy to give advice on which solution is most suitable for your needs, depending on your plumbing situation. Why not ask us to view your property and discuss the various options with you now. Contact us today and schedule an appointment with our San Francisco plumbers today.

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