Backflow Testing Services in Fairfield, Ohio
Finding a reliable backflow testing professional in Fairfield, Ohio is essential for maintaining a safe water supply and staying in compliance with local regulations. Our directory lists 61 backflow testing companies serving Fairfield and surrounding communities including Hamilton, Mason, Middletown.
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 Fairfield area.
Most water authorities in Ohio 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 Fairfield 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.
61 listed providers

Dupps Plumbing, Inc.
Company · Hamilton, OH · 3 mi
“We experienced an emergency shower leak that affected our family room ceiling. Dupps promptly responded on a Saturday evening when other companies were only available Monday. Dan arrived on time and…”
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Nieman Plumbing
Company · Cincinnati, OH · 4 mi
“We cannot say enough good things about Nieman Plumbing. Brennan and Ian arrived this morning to address problems with the cast iron drains below the basement slab of our 60 year old ranch…”
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Queen City Mechanicals
Company · Testing Verified · Cincinnati, OH · 4 mi

Blue Chip Plumbing
Company · Testing Verified · Cincinnati, OH · 4 mi
“We’ve had Peter Z. from Blue Chip Plumbing out to our home for two different issues - one involving our home's water pressure and another to replace a decades-old bathroom sink - and we couldn’t be…”
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Mr. Rooter Plumbing of Greater Cincinnati
Company · Cincinnati, OH · 6 mi
“Cannot rave enough at the amazing techs and excellent service I was provided today using Mr Rooter! Had an unexpected water line bust overnight (something I’ve never witnessed or experienced anything…”
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Cinti Master Plumbers Association
Individual · Cincinnati, OH · 6 mi
“Joyce does a great job running this. I am in the restoration business but have met some great people through this organization.”
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Nicholson Lab Inc
Company · Testing Verified · West Chester Township, OH · 6 mi

Ken Herbert Plumbing
Company · Testing Verified · Cincinnati, OH · 9 mi
“Highly recommend Ken Herbert plumbing company. They helped us recover from a plumbing nightmare for a reasonable cost. All the staff was very efficient, friendly, knowledgeable, professional and…”
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Backflow Prevention Services
Company · Testing Verified · Liberty Township, OH · 10 mi
“Another great experience in 2025 for a backflow test. Highly recommend Backflow Prevention Services. Responsive, reasonably priced and knowledgeable, Hired to test my irrigation backflow. Tim found a…”
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Halpin Plumbing Inc
Company · Testing Verified · Cincinnati, OH · 12 mi
“Halpin recently completed a complex, three-day job at our residence. We are extremely pleased with every aspect of the service. We want to specifically commend Geoff and Rob. They were timely…”
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Archer Plumbing Co Inc
Company · Cincinnati, OH · 13 mi
“Work Performed June 12, 2019 This was my first time looking for a truly real, qualified plumber, because I could no longer trust the work of pseudo plumbers. I had a busted indoor basement pipeline…”
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Zins Plumbing
Company · Testing Verified · Cincinnati, OH · 13 mi
“The only word which accurately describes the service I received from this company is "Remarkable." I previously owed rental properties and used plumbers many time for interior plumbing and sump pump…”
Read more on GoogleQuality Comfort Home Services HVAC, Plumbing, Duct Cleaning
Company · Cincinnati, OH · 13 mi
Allied Reddi-Rooter
Company · Cincinnati, OH · 13 mi
“Wow! So impressed and grateful to Allied. I needed a sewer line inspection done same day. I called and they set me up with an appointment range of 4-7pm. Rik and his assistant arrived PROMPTLY at 4pm…”
Read more on GoogleRoto-Rooter Plumbing & Water Cleanup
Company · Testing Verified · Norwood, OH · 14 mi
“I had a great customer service experience with roto rooter. My wife and I needed our sump pump replaced and the problem was immediately identified by a tech, Giovanni, who showed up well within the 2…”
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Nixco Plumbing Inc.
Company · Testing Verified · Mason, OH · 15 mi
“❄️ When a snow emergency ends, and your week begins at 8:00 AM promptly, you need pros who show up on time and ready to make an impact! CHECK, CHECK, DONE! Nixco Plumbing scores! At 9 degrees and…”
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Apollo Home
Individual · Cincinnati, OH · 15 mi
“Nate has an extensive grasp of how underground plumbing works. He is knowledgeable, meticulous, and professional. His piping is a work of art. He fixed a slab leak that another company completely…”
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Frequently Asked Questions About Backflow Testing in Fairfield
Backflow testing in Fairfield, Ohio 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 Fairfield 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 Fairfield 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 Ohio require cross-connection control programs for commercial properties and irrigation systems.
Many municipalities in Ohio require annual backflow testing for commercial and residential properties with backflow prevention devices. Your local water authority in Fairfield can confirm the exact testing schedule and deadlines for your area. Failing to test on time may result in fines or water service interruption.
Some certified testers near Fairfield offer same-day or emergency scheduling for urgent situations such as a failed device, a compliance deadline, or a new construction inspection. Check individual provider listings above for availability, or request a quote to find a tester who can accommodate your schedule.
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