Fresno & Tulare Counties · Veteran-Owned
Same-Day Backflow Testing
Certified backflow testing, repair and installation across the San Joaquin Valley. We test, fix and file your report with the water district.
- ABPA Certified
- CA C-36 Lic. #1145421
- U.S. Army Veteran

Quick Facts
- Backflow Plumbing Solutions provides same-day backflow testing in Fresno, Clovis, Visalia, Tulare, Reedley, Dinuba, Sanger, Selma, Kingsburg and surrounding San Joaquin Valley towns, when the schedule allows.
- The business is veteran-owned by Fernando Mendez, MPH, a U.S. Army veteran and ABPA-certified backflow tester and Cross-Connection Control Specialist.
- Backflow Plumbing Solutions is a California C-36 plumbing contractor, License #1145421.
- Services include annual backflow testing, repair, installation, cross-connection surveys, and filing test reports with local water districts.
- To schedule, call or text 559-480-5538 or email backflow559@gmail.com.
Services
Same-Day Backflow Testing
Need it done today? Call early and we'll get out to you when the schedule allows.
Annual Backflow Testing
Certified testing of RP, DC, PVB and other assemblies to meet your water district's requirement.
Backflow Repair
Failed test? As a C-36 plumbing contractor we repair, rebuild and retest.
Backflow Installation
New and replacement backflow prevention assemblies, installed and tested.
Cross-Connection Surveys
Property inspections by a Cross-Connection Control Specialist.
Report Filing
We file your test results with your local water purveyor.

Why Backflow Plumbing Solutions
Owned and run by Fernando Mendez, MPH, a U.S. Army veteran with a public-health background. Protecting your community's drinking water is the job.
- Same-day testing when available
- ABPA-certified tester & Cross-Connection Control Specialist
- Licensed C-36 plumbing contractor: test, repair and install
- Results filed with your water purveyor
Follow our work:
Real jobs. Real valves.
Watch Us on TikTok
See how a backflow test actually works, what a failed assembly looks like, and quick tips for homeowners and businesses in the Valley. Search "backflow test Fresno", "same day backflow testing", "backflow testing Visalia" or "veteran-owned plumber Fresno" and find us at @backflowplumbingsolution.
Service Area
Serving the greater San Joaquin Valley in Fresno and Tulare Counties:
- Fresno
- Clovis
- Visalia
- Reedley
- Dinuba
- Sanger
- Selma
- Kingsburg
- Tulare
- & surrounding towns
Common Questions
What is a backflow preventer?
A backflow preventer (also called a backflow prevention assembly) is a set of valves installed on a water line that lets water flow only one way. It stops dirty or contaminated water from flowing backward into the clean public drinking water supply. Backflow Plumbing Solutions tests, repairs and installs backflow preventers throughout Fresno and Tulare Counties.
Why is annual backflow testing required in California?
California regulations require water suppliers to run a cross-connection control program. Most water purveyors require backflow prevention assemblies to be tested when installed and at least once a year after that, to confirm they still work. Your water district will usually mail a notice when your test is due.
Where do I get my backflow tested?
The test is done at your property, right where the assembly is installed. You don't take anything anywhere. In the Fresno, Clovis, Visalia and Tulare County area, call Backflow Plumbing Solutions at 559-480-5538 and a certified tester comes to you.
Who does same-day backflow testing in Fresno?
Backflow Plumbing Solutions offers same-day backflow testing in Fresno, Clovis and nearby areas, when the schedule allows. Call 559-480-5538 early in the day for the best chance of a same-day appointment.
How long does a backflow test take?
Most standard tests take about 20 to 45 minutes per assembly, depending on the type, its condition and access. Repairs, if needed, take longer.
What happens if my backflow preventer fails the test?
A failed assembly needs to be repaired or replaced and then retested. Because Backflow Plumbing Solutions is a C-36 licensed plumbing contractor, we can usually repair it, retest it and file the passing report for you.
Who files the backflow test results with the water district?
The tester completes the test report. Backflow Plumbing Solutions files the results with your local water purveyor for you, so you don't have to.