Backflow Testing Services in El Monte, California
Finding a reliable backflow testing professional in El Monte, California is essential for maintaining a safe water supply and staying in compliance with local regulations. Our directory lists 19 backflow testing companies serving El Monte and surrounding communities including Rosemead, Temple City, Baldwin Park.
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 El Monte 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 El Monte 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.
19 listed providers

Los Angeles Plumbing & Backflow
Testing Verified · Irwindale, CA · 2 mi

USC Foundation for Cross-Connection Control and Hydraulic Research
Los Angeles, CA · 14 mi

Precision Backflow Testing & Repairs
Testing Verified · La Cañada Flintridge, CA · 14 mi
“Had a great experience with Precision Backflow! I called for information as we were looking for a new backflow testing company-we had a few bad experiences with the company we’d been using. I talked…”
Read more on GoogleH. L. Moe Co., Inc
Testing Verified · Glendale, CA · 15 mi

Prevent Backflow & Plumbing Inc.
No reviews yet
Testing Verified · Anaheim, CA · 17 mi

A-1 Performance Rooter & Plumbing
No reviews yet
Testing Verified · Long Beach, CA · 17 mi
Valley Backflow
Testing Verified · Burbank, CA · 18 mi
“Called a handful of companies and they were the most responsive at the best price. Service was great and I would use again!”
Read more on GooglePlumbquest Plumbing & Backflow testing
No reviews yet
Los Angeles, CA · 18 mi


BAVCO - Backflow Repair Parts & Backflow Supply
Long Beach, CA · 19 mi
“I ordered the parts for my PVB backflow preventer and it seem like I just got off the Internet and the parts were at my door it was fast!!!!! Customer service was very good, trust me, I would’ve gave…”
Read more on Google
CAL VALVE INC.
Testing Verified · Anaheim, CA · 19 mi
“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

Prodigy Plumbing | Long Beach Plumber
Testing Verified · Long Beach, CA · 19 mi
Cover Your Brass - Backflow Testing and Backflow Cage Manufacturer
Testing Verified · Signal Hill, CA · 20 mi
“Our plumbing company in Orange County Ca needed backflow anti theft cages asap for our customers who had their backflow assemblies stolen. Bill the owner came through for us! The products we…”
Read more on GoogleHelpful resources
Frequently Asked Questions About Backflow Testing in El Monte
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 El Monte 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 El Monte 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 El Monte, 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 El Monte 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 El Monte 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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