Backflow Testing Services in Fontana, California
Finding a reliable backflow testing professional in Fontana, California is essential for maintaining a safe water supply and staying in compliance with local regulations. Our directory lists 22 backflow testing companies serving Fontana and surrounding communities including Rialto, Rubidoux, Colton.
Whether you need annual backflow testing, RPZ (Reduced Pressure Zone) valve inspection, or cross-connection control services, the providers listed below offer professional testing services for both residential and commercial properties throughout the Fontana area.
Most water authorities in California require annual testing and reporting for all backflow prevention assemblies. A certified backflow tester will inspect your devices, perform the required differential pressure tests, and file compliance reports with your local water authority.
Browse the listings below to compare ratings, read customer reviews, and contact backflow testing professionals near Fontana directly. Use the filters above to narrow results by rating, review count, or specific services like RPZ testing and preventer installation.
Data source: Google Maps. Always verify licensing with your local water authority.
22 listed providers

Mr. Rooter Plumbing of The Inland Empire
Fontana, CA · 5 mi
“I recently had a shower valve body replacement done by Hector from Mr. Rooter, and the experience was outstanding. The original valve was seized, and a simple cartridge replacement wasn’t possible…”
Read more on Google
Mr. Rooter Plumbing of San Bernardino
Colton, CA · 6 mi
“Our 20+ year old water heater died on us and had to be immediately replaced. I contacted at least 7 plumbing companies and Mr. Rooter was the only one who had same day availability. Also, the rep…”
Read more on Google

Big Mike's Rooter & Plumbing Company, Inc.
San Bernardino, CA · 8 mi
“I was told it was going to cost approximately $1000 to replace the shower valve. Big Mike’s came out and found that when the previous plumber changed the stems, he did not replace the seats in the…”
Read more on Google
All City Plumbing, Air & Electrical
No reviews yet
Rancho Cucamonga, CA · 9 mi
Roto-Rooter Plumbing & Water Cleanup
No reviews yet
Riverside, CA · 10 mi

Ballard Plumbing Heating & Air Conditioning
San Bernardino, CA · 11 mi
“I like Brent he’s funny easy going I felt comfortable with him. He didn’t make me feel pressured into signing anything. If I didn’t understand something he explained it very well. I met Jose he took…”
Read more on Google
Basic Backflow
Testing Verified · San Bernardino, CA · 11 mi

Jim & Sons Plumbing & Rooter
Testing Verified · Riverside, CA · 12 mi

E.R. Block Plumbing Inc.
No reviews yet
Riverside, CA · 12 mi
Campbell Family Plumbing & Electric
Riverside, CA · 13 mi

LeBlanc Backflow Service
No reviews yet
Testing Verified · Moreno Valley, CA · 13 mi

Southern California Backflow
Testing Verified · Riverside, CA · 13 mi
Dependable Plumber Inc
No reviews yet
Moreno Valley, CA · 15 mi

Amazing Force Plumbing & Backflow LLC
Corona, CA · 15 mi
“Where do I begin......... Amazing Force Plumbing has provided excellent service for my rental properties as well as my home for the last several years. Kenneth is the owner and he takes pride in…”
Read more on GoogleHelpful resources
Frequently Asked Questions About Backflow Testing in Fontana
Most jurisdictions in California require backflow testers to hold a current certification from an approved training program, typically involving classroom instruction, a hands-on practical exam, and continuing education credits. Some municipalities maintain their own approved-tester lists. Always verify certification before hiring.
Residential tests typically involve a single PVB or DCVA device and are quicker to complete. Commercial properties in Fontana often have multiple assemblies, RPZ devices, and fire-line backflow preventers that require more time and specialized equipment. Pricing and scheduling may differ for each type.
Many certified backflow testers in Fontana will file test reports directly with your local water authority or municipality on your behalf. Confirm this with your provider before scheduling. Some jurisdictions require the property owner to submit reports, while others accept direct submissions from the tester.
Backflow testing in Fontana, California typically costs between $50 and $200 per device, depending on the type of backflow preventer and the complexity of the installation. RPZ assemblies generally cost more to test than double check valve assemblies. Contact providers listed above for current pricing in the Fontana area.
If a backflow preventer fails its annual test, the certified tester will diagnose the issue — often a worn check valve, damaged disc, or fouled relief valve. Most testers in Fontana can repair the device on site and re-test it the same day. Your water authority may require the passing report within a set deadline.
Nearby Cities in California
For Providers
Own a Backflow Testing Business?
Claim your listing to manage your profile, track leads, and get premium placement.




