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.

Paul’s Promise Plan

Extended Warranty, Priority Service, and Exclusive Savings.

Maintenance Details

$25 OFF Backflow Testing and Certification

Coupons & special offers cannot be combined with other offers. Valid on standard pricing only. Limit one offer per household. Coupon must be presented prior to starting job. Coupon must be mentioned at the time of booking job.

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

Backflow Valve Testing Derry, NH | Backflow Prevention Testing Londonderry, NH: Nashua, NH | Emergency Backflow Testing Hudson, NH

Affordable Backflow Testing ∴ Backflow Inspection Services ∴ Annual Backflow Testing ∴ Emergency Backflow Testing ∴ Plumbing Backflow Testing ∴ Derry, NH ∴ Londonderry, NH: Nashua, NH ∴ Hudson, NH

Rated 4.8 on Google with 2.9k+ reviews

V. Vincze

We had an issue with our water…too hard, calcium deposits, and very little pressure in our master bathroom shower only. The techs (Mike E. & Tyler S.) arrived right on time. They were friendly and very personable. After installing our whole house filtration system and successfully finding the issue with our master bathroom, they left the work areas in pristine condition. They were meticulous in their work, and I highly recommend them for any plumbing needs!

J. Shea

John was wonderful. He found the problem right away and fixed it. He checked other outlets just to make sure I would be safe. He explained different programs the company offers also. I’m very happy.

S. DesMarais

Josh was amazing. He was able to install my ring doorbells with no issues. He also did a great check of my homes smoke detectors and a few electrical plugs. He was thorough, Knowledgeable, and easy to work with. I would definitely use them again.

Nick Boudreux

Had a well pump that was shorting out and pretty much had no water. Adrian from this company not only got out next day but was great to work with. He was very friendly and knowledgeable I would definitely recommend this company to anyone that needs work done! Thanks again guys!

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.

D. Weaver

What a fantastic business. Helped us work with our water district in resolving meter replacement issues. They also fixed a pipe leak that had developed over time. Caleb was wonderful and answered our questions as well as working with the water district engineer on the meter issues. So easy to work with.

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

M. Richdale

Thanks to Mike Vallee from Paul the Plumber for responding to this new customer’s call so quickly. He was courteous, thorough, explained the repair he was doing and left the work area spotless. I highly recommend Paul the Plumber (and Mike!) to anyone looking for a reliable plumbing company.

W. Chepren

I made an appointment on line the morning of July 31 and two trucks showed up at 1:00 pm right on time that same afternoon. Both guys were friendly and very knowledgeable. They quickly found the source of the wet patch on my ceiling which wasn’t the plumbing but a problem with the shower curtain. This is the second time I have called Paul. Both times I got outstanding service and will always call on Paul the Plumber for any plumbing problems in the future. Very reasonable cost for the visit.

S. Baraket

Never used Paul The plumber company before but I’m glad I did. Very courteous, professional and pleasant from the answering service (Diane) to employees (Jeremy). They diagnosed the problem and fixed it in no time. Very happy and satisfied with their service. Definitely will use again. Thank you

D. Lefort

Arrived as scheduled to fix a leak from the shower valve. Tried to fix old 30 or 40 year old unit but had to replace with a new one. Quality work, parts and cleaned up when they were done. Would definitely use again.

Michele

I’ve used Paul the Plumber twice now for electrical issues and they have been wonderful each time. They are fast, polite, knowledgeable, and very fairly priced. They explain everything well and answer my questions thoroughly and I feel safer now knowing what was causing my electrical issues and having it fixed! I will be using Paul the Plumber for all my household needs going forward

J. Wojo

DJ from PTP was incredibly helpful and knowledgeable. My shower was not draining and it became a bigger project than I thought it would and they came out quickly and were able to fix my problem. Then when my water heater had a slow leak they came back out quickly to attend to it and fix my problem. I really appreciate their hard work. Thank you so much!! Would definitely recommend them.

D. Marchand

I cannot say enough about this company!!! Their only concern is that you are up and running again with no worries. I’ve had Kyle the plumber, and Josh their electrician out here and both are polite, well trained and you can tell they truly care about getting you back in service. Great service, well trained caring staff! I will never go anywhere else!

H. MacPherson

I would recommend Paul the Plumber 100%. They offered same/next day service. They were friendly, professional and quick – from the office staff to the technicians. Overall an amazing experience from start to finish.

K. Bernardo

We’re first time home owners and needed help with some plumbing and adding a filter system. They were able to get a technician scheduled to our house within a day or so of me contacting them. Mike was super helpful and was able to complete all the jobs in a timely manner, and also cleaned up the areas he was working in. Overall a great experience and would definitely use them for future jobs.

Why Is Backflow Testing Important?

How Does Paul The Plumber Perform Backflow Testing?

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

Backflow Valve Testing Derry, NH | Backflow Prevention Testing Londonderry, NH: Nashua, NH | Emergency Backflow Testing Hudson, NH

Affordable Backflow Testing ∴ Backflow Inspection Services ∴ Annual Backflow Testing ∴ Emergency Backflow Testing ∴ Plumbing Backflow Testing ∴ Derry, NH ∴ Londonderry, NH: Nashua, NH ∴ Hudson, NH

Affordable Backflow Testing

Emergency Backflow Testing

Backflow Inspection Services

Annual Backflow Testing

Plumbing Backflow Testing

Backflow Valve Testing

Backflow Preventer Testing

Litchfield, NH

Manchester,NH

Windham, NH

Hudson,NH

Sandown, NH