Backflow Testing Services in Larchmont, New York
Finding a reliable backflow testing professional in Larchmont, New York is essential for maintaining a safe water supply and staying in compliance with local regulations. Our directory lists 44 backflow testing companies serving Larchmont and surrounding communities including New Rochelle, Mount Vernon, Harrison.
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 Larchmont area.
Most water authorities in New York 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 Larchmont 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.
44 listed providers

Guardian Backflow Testing LLC
Testing Verified · Larchmont, NY · < 1 mi
J&J Backflow Device Testers Inc.
Testing Verified · New Rochelle, NY · 2 mi
Pro Boyz Drain Cleaning and Plumbing Services Inc.
Yonkers, NY · 6 mi
C. C. Controlled Combustion Co. Inc.
Bronx, NY · 8 mi

VEPO Solutions
Astoria, NY · 13 mi
“Had the opportunity to come across a hardworking gentleman by the named of Alvo. He was the most respectful person ever. We exchanged info to learn he was from Jamaica and gave me some great vacation…”
Read more on Google

Long Island Backflow Testing
Testing Verified · Mineola, NY · 13 mi
“I just hired Long Island BackFlow Test to inspect our buildings backflow. I received a letter from the city and needed to handle my situation immediately. They were quick returning my call making…”
Read more on Google
Backflow Prevention of New York, LLC
Astoria, NY · 13 mi
123BackFlowTesting
No reviews yet
Testing Verified · Astoria, NY · 14 mi


AAA Backflow Certification of NY, LLC.
Testing Verified · New Hyde Park, NY · 14 mi

Systems 2000
Testing Verified · New York, NY · 14 mi

Maxwell Plumb Mechanical Corp.
Testing Verified · Glendale, NY · 16 mi

Bluewater Plumbing, Heating and Air Conditioning
No reviews yet
Middle Village, NY · 16 mi

Neo Plumbing & Heating Corp
Testing Verified · New York, NY · 16 mi

Backflow Friends
Testing Verified · Hempstead, NY · 17 mi
“Carlos is a stand up honest guy. I called to have a PVB/Backflow preventer tested for the water utility in my area for my lawn sprinklers. He answered my phone call right away and was very…”
Read more on Google
A Real Good Plumber, Inc.
Testing Verified · Brooklyn, NY · 17 mi

Kruger's Training Academy
Testing Verified · New York, NY · 17 mi
“EXCEPTIONAL TRAINING EXPERIENCE! I recently completed the Backflow Preventer course with Kruger Training Academy, and I'm thoroughly impressed! The instructor, Dustin Kruger, is knowledgeable…”
Read more on Google
Harris Water Main & Sewer Contractors
Brooklyn, NY · 18 mi
“Two weeks ago, on January 13, my sewer line broke. Roto-rooter charged me over $2,200 just to diagnose the problem, and then they wanted another $34,000 to replace it. They were only going to…”
Read more on GoogleFulton Street Plumbing and Heating
No reviews yet
Testing Verified · Brooklyn, NY · 20 mi
Helpful resources
Frequently Asked Questions About Backflow Testing in Larchmont
Residential tests typically involve a single PVB or DCVA device and are quicker to complete. Commercial properties in Larchmont 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 Larchmont 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 Larchmont, New York 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 Larchmont 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 Larchmont 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 New York require cross-connection control programs for commercial properties and irrigation systems.
Nearby Cities in New York
For Providers
Own a Backflow Testing Business?
Claim your listing to manage your profile, track leads, and get premium placement.










