Backflow Testing Services in Middletown, Ohio
Finding a reliable backflow testing professional in Middletown, Ohio is essential for maintaining a safe water supply and staying in compliance with local regulations. Our directory lists 12 backflow testing companies serving Middletown and surrounding communities including Mason, Hamilton, Fairfield.
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 Middletown 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 Middletown 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.
12 listed providers

Backflow Prevention Services
Testing Verified · Liberty Township, OH · 9 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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Nixco Plumbing Inc.
Testing Verified · Mason, OH · 11 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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Dupps Plumbing, Inc.
Hamilton, OH · 14 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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Mr. Rooter Plumbing of Greater Cincinnati
Cincinnati, OH · 14 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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Nicholson Lab Inc
Testing Verified · West Chester Township, OH · 15 mi
Copper Pipe Plumbing Services Inc.
Testing Verified · Maineville, OH · 17 mi

Cinti Master Plumbers Association
Cincinnati, OH · 17 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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Nieman Plumbing
Cincinnati, OH · 18 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
Testing Verified · Cincinnati, OH · 18 mi

Blue Chip Plumbing
Testing Verified · Cincinnati, OH · 18 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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Frequently Asked Questions About Backflow Testing in Middletown
Many certified backflow testers in Middletown 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 Middletown, 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 Middletown 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 Middletown 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 Middletown can confirm the exact testing schedule and deadlines for your area. Failing to test on time may result in fines or water service interruption.
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