Backflow testing for San Diego properties

What we help with

This search already has a local tester in the first organic rank and a city compliance page on the first page. That is evidence of a recurring reason to search — not a partnership with the city or with any named tester.

• Annual or notice-driven tests

  If you received a letter, a tenant notice, or a due date from the water department, put that date in the form. Recurring test customers may already have a tester; say so if you do.

• Commercial, multi-family, and irrigation

  Assemblies show up on commercial buildings, HOAs, irrigation, and some residences. Describe the property type and how many devices you know about.

• Failed tests and repairs

  A failed test may need a rebuild or replacement before a passing report. This page can pass that request. It cannot certify the device.

• Not a plumbing emergency page

  If water is off or a pipe is broken, call a plumber directly. This form is for scheduled testing, not a burst line.

Guides

Short explainers for common San Diego questions. They are not a diagnosis and not a bid. Use a request page when you want someone to look.

• What is backflow testing

  Backflow testing is a certified check of a backflow preventer — the assembly that keeps irrigation, fire-line, or building water from reversing into the public supply. Most local water agencies require it on a regular interval, often yearly, and they mail you when it is due. This site forwards a request. It is not the tester of record and does not file the report.

• RPZ valve

  An RPZ valve is a reduced pressure zone assembly — the high-protection backflow preventer on many commercial, irrigation, and fire lines. It has two shutoffs and a relief valve in the middle that can spit when something is wrong. It also fails tests more often than a simple double-check. This page names the device. It does not test it.

• Backflow preventer leaking

  A leaking backflow preventer is usually a relief port discharging or a check that will not hold. On an RPZ, a relief that dumps is the device telling you it is not passing. The water agency still wants a passing report. That means repair or replacement, then a retest. This page cannot make a leak disappear.

• What is a backflow preventer

  A backflow preventer is a plumbing assembly that stops water from reversing into the potable supply. Irrigation, fire lines, and many commercial buildings in San Diego County have one because fertilizer, standing water, or building pressure should not enter the public main. The device is why you get a test notice. This page defines it. It does not replace the utility.

All backflow testing guides

Backflow testing statistics

This page counts the City of San Diego Public Utilities Department approved backflow tester list and quotes the city’s published annual-test notices. It is not a tester of record, not a price list, and not a pass guarantee. A certified local tester may contact you if they accept a lead.

San Diego backflow testing statistics, 2026

How a request works

Licensing and advertising limits for backflow testers still need a real provider review. Until then, this site only forwards a request.

1. 1

   Send the notice details

   Property city, number of assemblies if known, due date, and whether this is a first test or a replacement tester.

2. 2

   We route a tracked lead

   The request includes this domain, backflow testing, and San Diego DMA so it is not mixed with plumbing-repair leads.

3. 3

   A certified tester may contact you

   If they accept, they schedule the test and they file whatever report their license requires. You can decline.