FBT

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

Services:
Pro Backflow Testing Services backflow testing
Testing Verified
4 mi

Pro Backflow Testing Services

5.0(4)

Testing Verified · Rialto, CA · 4 mi

Backflow Testing
Website
Mr. Rooter Plumbing of The Inland Empire backflow testing
5 mi

Mr. Rooter Plumbing of The Inland Empire

4.8(589)

Fontana, CA · 5 mi

Backflow Testing

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…

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Website
Mr. Rooter Plumbing of San Bernardino backflow testing
6 mi

Mr. Rooter Plumbing of San Bernardino

4.8(1,356)

Colton, CA · 6 mi

Backflow Testing

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…

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Website
Rossman Plumbing backflow testing
8 mi

Rossman Plumbing

4.7(148)

Riverside, CA · 8 mi

Emergency Service
Website
First Class Plumbing & AC backflow testing
8 mi

First Class Plumbing & AC

No reviews yet

Rancho Cucamonga, CA · 8 mi

CommercialEmergency Service
Website
NIR Plumbing & Air Conditioning backflow testing
Testing Verified
8 mi

NIR Plumbing & Air Conditioning

4.8(161)

Testing Verified · Riverside, CA · 8 mi

Backflow Testing
Website
Ferguson Waterworks backflow testing
8 mi

Ferguson Waterworks

No reviews yet

Riverside, CA · 8 mi

ResidentialEmergency ServiceFree Estimates
Website
Big Mike's Rooter & Plumbing Company, Inc. backflow testing
8 mi

Big Mike's Rooter & Plumbing Company, Inc.

4.2(95)

San Bernardino, CA · 8 mi

Backflow TestingCommercial

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…

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Website
Backflow Parts USA backflow testing
9 mi

Backflow Parts USA

4.8(9)

Rancho Cucamonga, CA · 9 mi

Website
All City Plumbing, Air & Electrical backflow testing
9 mi

All City Plumbing, Air & Electrical

No reviews yet

Rancho Cucamonga, CA · 9 mi

Preventer RepairCommercial
Website
Roto-Rooter Plumbing & Water Cleanup backflow testing
10 mi

Roto-Rooter Plumbing & Water Cleanup

No reviews yet

Riverside, CA · 10 mi

CommercialResidentialEmergency Service
Website
Ballard Plumbing Heating & Air Conditioning backflow testing
11 mi

Ballard Plumbing Heating & Air Conditioning

4.9(2,297)

San Bernardino, CA · 11 mi

Backflow Testing

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…

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Website
Basic Backflow backflow testing
Testing Verified
11 mi

Basic Backflow

3.9(12)

Testing Verified · San Bernardino, CA · 11 mi

Backflow TestingPreventer InstallationPreventer Repair
Website
Righty Tighty Plumbing Inc. backflow testing
12 mi

Righty Tighty Plumbing Inc.

No reviews yet

Riverside, CA · 12 mi

CommercialResidential
Website
Jim & Sons Plumbing & Rooter backflow testing
Testing Verified
12 mi

Jim & Sons Plumbing & Rooter

5.0(760)

Testing Verified · Riverside, CA · 12 mi

Backflow TestingCommercialEmergency Service
Website
First Class Plumbing & AC backflow testing
12 mi

First Class Plumbing & AC

4.9(810)

Riverside, CA · 12 mi

CommercialEmergency Service
Website
E.R. Block Plumbing Inc. backflow testing
12 mi

E.R. Block Plumbing Inc.

No reviews yet

Riverside, CA · 12 mi

Preventer InstallationPreventer RepairCommercial
Website
Campbell Family Plumbing & Electric backflow testing
13 mi

Campbell Family Plumbing & Electric

4.9(87)

Riverside, CA · 13 mi

CommercialEmergency ServiceSame Day Service
Website
LeBlanc Backflow Service backflow testing
Testing Verified
13 mi

LeBlanc Backflow Service

No reviews yet

Testing Verified · Moreno Valley, CA · 13 mi

Backflow TestingPreventer Repair
Website
Southern California Backflow backflow testing
Testing Verified
13 mi

Southern California Backflow

5.0(5)

Testing Verified · Riverside, CA · 13 mi

Backflow TestingPreventer InstallationPreventer Repair
Website
Dependable Plumber Inc backflow testing
15 mi

Dependable Plumber Inc

No reviews yet

Moreno Valley, CA · 15 mi

CommercialEmergency ServiceSame Day Service
Website
Amazing Force Plumbing & Backflow LLC backflow testing
15 mi

Amazing Force Plumbing & Backflow LLC

5.0(322)

Corona, CA · 15 mi

Backflow TestingPreventer InstallationPreventer Repair

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…

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Website

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.

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