Backflow Testing Services in Largo, Florida
Finding a reliable backflow testing professional in Largo, Florida is essential for maintaining a safe water supply and staying in compliance with local regulations. Our directory lists 13 backflow testing companies serving Largo and surrounding communities including Clearwater, Pinellas Park, Dunedin.
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 Largo area.
Most water authorities in Florida 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 Largo 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.
13 listed providers

Elite Plumbing of FL LLC
Testing Verified · St. Petersburg, FL · 7 mi
“I’m a first time home owner and immediately knew I was going to have to replace my 27 year old hot water heater very shortly after moving in. I went to a local Facebook group to see who people were…”
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Billy The Sunshine Plumber
St. Petersburg, FL · 9 mi
“I recently had some repair work done in my condo in St. Petersburg. The work was assigned to Mark. Mark showed up on time. He was very friendly, and the three things, IMO, that a professional plumber…”
Read more on GoogleRoto-Rooter Plumbing & Water Cleanup
Testing Verified · St. Petersburg, FL · 10 mi
“Review for Joe at Roto-Rooter Plumbing Co. I want to express my sincere appreciation for the outstanding service Joe provided at my daughter’s home. From start to finish, Joe demonstrated exceptional…”
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Technical Services
St. Petersburg, FL · 10 mi
“Gary and Tom have been exceedingly helpful. I just wrote and I’m sure that they will answer as I need a little bit of help in cleaning my system. They do the water for my neighborhood. And ever since…”
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A1 Plumbers St Petersburg
Testing Verified · St. Petersburg, FL · 13 mi
“I had a water heater that quit working, and A1 Plumbers St Petersburg stepped in right away. They checked the whole system, fixed what was wrong, and made sure everything was safe before leaving. The…”
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ABC Plumbing, Air, Heat & Electric
Tampa, FL · 17 mi
“I called ABC PLUMBING at 5:55 pm on a Friday evening. Customer service was very pleasant in helping me schedule an emergency call. I was spring cleaning and pulled out my refrigerator to see the…”
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Ultimate Plumbing Solutions LLC
Tampa, FL · 17 mi
“After eight years living in my house, I needed to have a spigot removed and replaced due to a small leak. I had company Frank Gay come to my house and tell me that they were going to break my…”
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Daneneal Global LLC / A Advanced Backflow Testing & Repair
No reviews yet
Testing Verified · Tampa, FL · 18 mi

Believe Plumbing
Tampa, FL · 19 mi
“We decided to take on the task of getting our entire home re-piped after having a few copper leaks in old copper pipes. This was a big undertaking as it is an expensive job and involves a lot of…”
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Frequently Asked Questions About Backflow Testing in Largo
Many certified backflow testers in Largo 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 Largo, Florida 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 Largo 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 Largo 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 Florida require cross-connection control programs for commercial properties and irrigation systems.
Many municipalities in Florida require annual backflow testing for commercial and residential properties with backflow prevention devices. Your local water authority in Largo 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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