Serving 20 listed cities and communities across North County and San Diego
CA License #1117220
Mr. BackflowNorth County San Diego (760) 492-7389
San Diego · Annual testing and compliance

Backflow Testing in San Diego

Certified backflow testing in San Diego for eligible domestic and irrigation assemblies, with certification and district filing included.

A backflow assembly connected to a pressure test gauge during Mr. Backflow field work
Backflow Testing

Backflow Testing for San Diego Properties

San Diego service requests include homes, HOAs, multi-family properties and businesses across the city. The property address, serving water provider and current notice determine which record and requirement apply.

Annual testing checks whether an eligible backflow assembly is operating as required at the time of the test. The technician records the result and handles certification and district filing when applicable.

California Contractor License #1117220.

  • Certified test of an eligible assembly
  • Certification and district filing included
  • Clear next steps if the device does not pass
  • Property and device scope reviewed before scheduling
Service scope

Mr. Backflow provides certified testing, repairs, replacements, and installations for backflow preventers up to 3 inches. Fire systems and larger assemblies are not included in our service scope.

San Diego district details

City of San Diego Backflow Testing Starts With the Current Record

The City of San Diego states that backflow assemblies in its program require annual testing. The current notice, service address and assembly record identify the device and due date that apply to a particular property.

Some San Diego addresses are served by another water agency. Confirm the provider on the notice or bill before scheduling so the test and filing follow the correct program.

Review the official city of san diego backflow information ↗

Prepare the request

Details That Help Avoid Guesswork

  • Have the current notice, service address and assembly ID ready
  • Confirm the serving water provider before the appointment
  • Keep the assembly accessible for testing and valve operation

The water provider remains the source of truth for the property’s record, deadline, approved assembly and acceptance process.

Pricing and process

What to Expect

Eligible standard testing for devices 2 inches and under is $90. Devices larger than 2 inches through 3 inches require team review.

  1. 01

    Share the Notice

    Provide the property address, district name and any notice you received.

  2. 02

    Confirm the Device

    The team reviews the assembly size, system type and access details.

  3. 03

    Complete the Test

    A certified technician tests the eligible assembly and records the result.

  4. 04

    File the Result

    Testing includes certification and district filing; district processing and acceptance can vary.

Before you request service

Have the Property Details Ready

  • The San Diego property address.
  • The water district and any notice you received.
  • The assembly size and system type, if known.
  • Photos or access information that may help the team review the scope.
Related local guide

All Backflow Services in San Diego

Review the city hub for local coverage, district information and all available Mr. Backflow service paths.

Open the San Diego backflow service guide →

San Diego testing questions

Common Questions

Does the City of San Diego require annual backflow testing?
The City states that backflow assemblies in its program require annual testing. The current notice or provider record controls for a particular property and device.
How much does backflow testing cost in San Diego?
Eligible standard testing for devices 2 inches and under is $90. Larger eligible devices through 3 inches require team review.
Is district filing included?
Yes. Eligible testing includes certification and district filing. Submission timing, district processing and acceptance can vary.
What happens if the assembly does not pass?
The technician can explain the result and recommend an eligible repair or replacement. Chargeable work beyond the authorized test is reviewed before it is performed.
Which assemblies are outside the published scope?
Mr. Backflow provides certified testing, repairs, replacements, and installations for backflow preventers up to 3 inches. Fire systems and larger assemblies are not included in our service scope.

Ready to Request Service?

We’ll confirm your appointment after we review your request and availability.

Call (760) 492-7389 Request service