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Backflow Testing Services in Pomona, California

Finding a reliable backflow testing professional in Pomona, California is essential for maintaining a safe water supply and staying in compliance with local regulations. Our directory lists 16 backflow testing companies serving Pomona and surrounding communities including La Verne, Claremont, Diamond Bar.

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 Pomona 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 Pomona 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.

16 listed providers

Services:
Hydro Backflow backflow testing
8 mi

Hydro Backflow

5.0(2)

West Covina, CA · 8 mi

Annual Certification FilingCommercialResidential
Website
All City Plumbing, Air & Electrical backflow testing
10 mi

All City Plumbing, Air & Electrical

No reviews yet

Rancho Cucamonga, CA · 10 mi

Preventer RepairCommercial
Website
Backflow Parts USA backflow testing
10 mi

Backflow Parts USA

4.8(9)

Rancho Cucamonga, CA · 10 mi

Website
First Class Plumbing & AC backflow testing
11 mi

First Class Plumbing & AC

No reviews yet

Rancho Cucamonga, CA · 11 mi

CommercialEmergency Service
Website
All City Plumbing, Air & Electrical backflow testing
14 mi

All City Plumbing, Air & Electrical

5.0(1,900)

Anaheim, CA · 14 mi

Preventer RepairCommercial
Website
Los Angeles Plumbing & Backflow backflow testing
Testing Verified
14 mi

Los Angeles Plumbing & Backflow

5.0(3)

Testing Verified · Irwindale, CA · 14 mi

Backflow TestingPreventer InstallationPreventer Repair
Website
Mr. Rooter Plumbing of The Inland Empire backflow testing
16 mi

Mr. Rooter Plumbing of The Inland Empire

4.8(589)

Fontana, CA · 16 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…

Read more on Google
Website
Amazing Force Plumbing & Backflow LLC backflow testing
16 mi

Amazing Force Plumbing & Backflow LLC

5.0(322)

Corona, CA · 16 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…

Read more on Google
Website
Prevent Backflow & Plumbing Inc. backflow testing
Testing Verified
18 mi

Prevent Backflow & Plumbing Inc.

No reviews yet

Testing Verified · Anaheim, CA · 18 mi

Backflow TestingEmergency Service
Website
Hydro Backflow backflow testing
18 mi

Hydro Backflow

5.0(2)

Arcadia, CA · 18 mi

Annual Certification FilingCommercialResidential
Website
E.R. Block Plumbing Inc. backflow testing
18 mi

E.R. Block Plumbing Inc.

No reviews yet

Riverside, CA · 18 mi

Preventer InstallationPreventer RepairCommercial
Website
Southern California Backflow backflow testing
Testing Verified
18 mi

Southern California Backflow

5.0(5)

Testing Verified · Riverside, CA · 18 mi

Backflow TestingPreventer InstallationPreventer Repair
Website
Splash Plumbing backflow testing
Testing Verified
19 mi

Splash Plumbing

4.8(288)

Testing Verified · Anaheim, CA · 19 mi

Backflow TestingCommercialResidential
Website
CAL VALVE INC. backflow testing
Testing Verified
19 mi

CAL VALVE INC.

5.0(5)

Testing Verified · Anaheim, CA · 19 mi

Cross-Connection Control

Great location right off Anaheim blvd so it’s super convenient. They always have what I need especially when it comes to backflow parts that can be annoying to track down elsewhere. The staff are…

Read more on Google
Website
Campbell Family Plumbing & Electric backflow testing
20 mi

Campbell Family Plumbing & Electric

4.9(87)

Riverside, CA · 20 mi

CommercialEmergency ServiceSame Day Service
Website

Frequently Asked Questions About Backflow Testing in Pomona

Residential tests typically involve a single PVB or DCVA device and are quicker to complete. Commercial properties in Pomona 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 Pomona 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 Pomona, 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 Pomona 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 Pomona 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.

Cross-connection control prevents contaminated water from flowing backwards into the clean water supply. Backflow prevention devices are installed at cross-connection points to protect public health. Regular testing ensures these devices function properly. Many municipalities in California require cross-connection control programs for commercial properties and irrigation systems.

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