Backflow Testing Services in Columbia, Maryland
Finding a reliable backflow testing professional in Columbia, Maryland is essential for maintaining a safe water supply and staying in compliance with local regulations. Our directory lists 30 backflow testing companies serving Columbia and surrounding communities including Ellicott City, Catonsville, West Elkridge.
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 Columbia area.
Most water authorities in Maryland 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 Columbia 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.
30 listed providers
Roto-Rooter Plumbing & Water Cleanup
Ellicott City, MD · 3 mi
Associates Plumbing, Inc.
Testing Verified · Columbia, MD · 5 mi
Roto-Rooter Plumbing & Water Cleanup
Elkridge, MD · 5 mi
Metcalf Plumbing Service, LLC
Catonsville, MD · 6 mi
“I had gotten three quotes from other plumbing companies to replace the entire drain stack in my home. None of the quotes really specified what work was to be done and the prices were magically round…”
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Roto-Rooter Plumbing & Water Cleanup
Jessup, MD · 7 mi
Mr. Rooter Plumbing of Greater Baltimore
Baltimore, MD · 9 mi
“On late Friday evening, I had a flood in my home. The water was coming through my refrigerator and it leaked down to my basement.. I called one of the popular plumbing services. They came out only to…”
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Roto-Rooter Plumbing & Water Cleanup
Linthicum Heights, MD · 9 mi
Nationwide Plumbing & Heating
Testing Verified · Halethorpe, MD · 10 mi
“Called for a quote of a replacement of my water heater, and receive GREAT customer service and a VERY reasonable total for the work to be done. I will be referring yall to my neighbors, friends, and…”
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F.H. Furr Plumbing, Heating, Air Conditioning & Electrical
Glen Burnie, MD · 11 mi
A & A Construction And Utilities, Inc.
Baltimore, MD · 11 mi
Pipeline Training Institute
Testing Verified · Sykesville, MD · 12 mi
“Class was professional presented, the professor knowledge of cross contamination as it relates to the different types of contamination hazards, which DCV, BP, and VB devices that should be used on…”
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Roto-Rooter Plumbing & Water Cleanup
Baltimore, MD · 13 mi
SLO-FLO Plumbing
Testing Verified · Severn, MD · 13 mi
“I had Slo-Flo Plumbing come out on 10/17/2024 to replace my main water line, and I couldn’t be happier with the service! They arrived on time and immediately impressed me with their professionalism…”
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Prime Plumbing
Testing Verified · Glen Burnie, MD · 14 mi
“It's taken me a while to write a review with two young kids- but i wanted to make sure i shared what a wonderful experience we had using Prime Plumbing. We had a sewer line back up in our basement…”
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Trust Plumbing & Heating, LLC
Testing Verified · Baltimore, MD · 15 mi
“Trust was wonderful to work with. My water heater busted and flooded my basement. They got to my home quickly, competently diagnosed the problem and took the time to explain my options for…”
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Roto-Rooter Plumbing & Water Cleanup
Towson, MD · 17 mi
Roto-Rooter Plumbing & Water Cleanup
Dundalk, MD · 17 mi
“After an almost 12-hr work day, I arrived home to an intermittent gurgling sound coming from my bathroom. I immediately turned the shut-off valve to the off position and contacted Roto-Rooter. Brian…”
Read more on GoogleNorth River Plumbing & Gas, LLC
Testing Verified · Gambrills, MD · 17 mi
Chesapeake Plumbing, Inc
Testing Verified · Pasadena, MD · 17 mi
“I was very pleased with the work that David from Chesapeake Plumbing, Inc. did. The one toilet had been spraying a fine mist which I felt might be the beginning of a leak and the handle on the shower…”
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Anne Arundel Plumbing, Inc.
Pasadena, MD · 18 mi
“We purchased a home after moving to the area and were not familiar with sump pumps and ground saturation, so we really didn't know where to start when our crawlspace was flooded with standing water…”
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Alpha Plumbing
Pasadena, MD · 18 mi
“Found Alpha Plumbing off Angi while looking for a local company. A+ BBB reviews. Arrived on time with everything needed. Quickly and efficiently replaced my leaking pressure valve. Workmanship…”
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D W Bahr Plumbing & Heating Co
Testing Verified · Baltimore, MD · 19 mi
“I ordered a new cast iron kitchen sink, faucet and garbage disposal from Home Depot. At my request, Home Depot contacted one of their trusted plumbing companies, D W Bahr Plumbing and Heating…”
Read more on Google
Helpful resources
Frequently Asked Questions About Backflow Testing in Columbia
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 Maryland require cross-connection control programs for commercial properties and irrigation systems.
Many municipalities in Maryland require annual backflow testing for commercial and residential properties with backflow prevention devices. Your local water authority in Columbia 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 Columbia 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.
Look for testers with active state certification, strong Google reviews, and experience with your type of backflow preventer (PVB, DCVA, or RPZ). Ask whether they file compliance reports with your local water authority and request a written estimate before scheduling. Our directory lists testers near Columbia with real customer reviews.
RPZ (Reduced Pressure Zone) testing verifies that your reduced pressure backflow preventer is functioning correctly to protect your water supply from contamination. A certified tester uses specialized gauges to measure differential pressures across the assembly. RPZ devices are typically required for high-hazard connections.
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