San Francisco's Backflow Testing Specialists

Backflow Testing and Plumbing Repairs Done Right

From annual backflow preventer tests to unexpected leaks, we walk you through every step so you understand your home's plumbing.

1 Backflow Plumbing work
5.0★
Google Rating
152
Google Reviews

Services

Everything we take on.

Backflow Preventer Testing
01

Backflow Preventer Testing

Annual backflow preventer inspections and testing to keep your home's plumbing compliant and protected.

Plumbing Repairs
02

Plumbing Repairs

General plumbing repairs, including leaks found during an inspection or reported on their own.

Photos

A look around.

1 Backflow Plumbing in San Francisco
1 Backflow Plumbing in San Francisco
1 Backflow Plumbing in San Francisco

Backflow testing done right, explained every step of the way.

Our story

About 1 Backflow Plumbing

We specialize in backflow preventer testing for homes across San Francisco, handling the annual inspections that keep your plumbing system in good standing. Scheduling and payment happen online, so getting on the calendar is simple.

Beyond backflow testing, we take care of plumbing issues that turn up along the way, from a leaky ceiling to other repairs an inspection uncovers. We explain what we find in plain terms, so you know exactly what your home needs and why.

Many of our customers call us back year after year for their annual test, and we're glad to keep earning that repeat business one appointment at a time.

  • Online scheduling and payment
  • Explains every step in plain terms
  • Handles repairs beyond backflow testing
  • Trusted by repeat annual customers

What customers say

“John performed our annual backflow preventer test and it was a great experience. Scheduling and payment was both online and easy.”

Fiaz Hossain

“Fantastic work, but the best part was John himself. He educated me about my new home so I understand what is needed to keep it in good repair.”

Elizabeth Pritts

“This was awesome! Very detailed in their work and made sure to explain every step of the process.”

Kenny Hall

Get it booked.

Serving San Francisco.

(415) 913-8941

5635 Anza St #3, San Francisco, CA 94121

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Hours

Open now
Monday
7:00 AM – 7:00 PM
Tuesday
7:00 AM – 7:00 PM
Wednesday
7:00 AM – 7:00 PM
Thursday
7:00 AM – 7:00 PM
Friday
7:00 AM – 7:00 PM
Saturday
Closed
Sunday
Closed

Read all 152 Google reviews (5★)

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5635 Anza St #3, San Francisco, CA 94121

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