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According to the town of Derry’s water code, backflow prevention devices must be checked at least twice a year by a certified tester. Paul The Plumber is registered by the state of New Hampshire to help you prevent issues with backflow in your home. Call the Residential Service Specialists at Paul The Plumber today and speak to one of our professional plumbing contractors about backflow certification!

Save on your backflow testing and certification service today when you visit our special discounts and offers page!

Why Is Backflow Testing Important?

Backflow is a problem that occurs when the flow of water in your pipes is reversed, thus contaminating your water supply. It can be caused by cross-connection in your water supply, which is when all of the contaminants you have flushed away or washed down your drains or gets mixed in with your incoming water supply.

Backflow poses an obvious health risk to yourself and your loved ones, as you could be drinking and exposing yourselves to contaminated water. For this reason, all homes in the state of New Hampshire are required to have a backflow prevention device installed if they have a pool, irrigation system, or fire sprinkler system.

If you are due for backflow testing, or if your prevention device is in need of repair, call Paul The Plumber today.

Want to know just what our customers think of our service? Visit our 5-star reviews page to find out!

How Does Paul The Plumber Perform Backflow Testing?

To begin with, your Paul The Plumber certified backflow testing contractor will shut off your water supply to check your backflow prevention device. Once the prevention device is located and the type of device identified, the plumber will determine the normal direction of your flow of water (so that if the flow changes direction, you and your plumber will be able to identify the problem). Next, your plumber will number the test cocks, clear them of debris, and assemble the adapters. Once downstream is completely shut off, the test kit hoses can be attached. If at this point water leaves the relief valves, the first test valve has to be cleaned again.

If your backflow prevention device does not pass this test, and the machinery is not working correctly, you may need backflow repairs as well. These repairs can also be provided by Paul The Plumber.

Certified Backflow Testing, Backflow Prevention Testing, Commercial Backflow Testing, Residential Backflow Testing & Backflow Testing Services Derry, NH, Londonderry, NH: Nashua, NH & Hudson, NH

Plumbing Backflow Testing Derry, NH | Backflow Testing Services Londonderry, NH: Nashua, NH | Backflow Valve Testing Hudson, NH

Backflow Inspection ServicesBackflow Valve TestingAffordable Backflow TestingPlumbing Backflow TestingBackflow Preventer Testing ∴ Derry, NH ∴ Hudson, NH ∴ Londonderry, NH: Nashua, NH

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K. MacCallum

First time customer, and am very pleased with the whole experience. The highlight was definitely with the technicians assigned to the job and their work – Tyree and Corey were clean, polite, well-informed, and very helpful with some of the questions I had along the way. Their work appears to be top-notch, and they made sure no mess was left behind. Will definitely be calling and requesting these two again on any future needs.

T. Minasian

These are the after photos of the Rinnai tankless water heater installation and vent to the outside. It was important to me that the crew was able to use the existing vent hole to the outside to run both the intake vent pipe and the outside vent pipe. It made the job very clean and did not change the appearance of the outside wall. A shout out to Mike E, Caleb, Josh & Corey

Serving southern NH, Seacoast, and greater Concord area

Paul The Plumber is proud to say that we’ve been providing high-quality service in plumbing, heating, air conditioning, and electrical for more than 22 years in Derry, NH, and the southern New Hampshire area.

Service Area List

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Affordable Backflow Testing

Emergency Backflow Testing

Backflow Inspection Services

Annual Backflow Testing

Plumbing Backflow Testing

Backflow Valve Testing

Backflow Preventer Testing

Manchester,NH

Sandown, NH

Litchfield, NH

Windham, NH

Hudson,NH