Mainline Plumbing

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71 Mammoth Rd

Londonderry, NH 03053

+1 (603) 472-5261

http://callmainline.com

Mainline Plumbing, Well Pumps, and Water Treatment was established in 1992. We are dedicated to providing 5-star customer service in Southern New Hampshire. Our expert technicians provide professional solutions and peace of mind to your unique Plumbing, Well pump, and Water treatment challenges. Mainline is your trusted provider for all Well and Water Treatment related problems.

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Reviews

4.012 reviews

Diana S.

8/20/2018

I think they are great. We have been using them for years and they are always friendly and on time. Diana Sheedy

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Fat J.

8/15/2024

I had an issue with our sediment filter. Located hanging from the ceiling. Difficult for me to climb a ladder and get it opened to change the cartridge. John came and got it moved down to 5 feet...

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Dhruv P.

8/1/2024

We had a small issue John Came to the store and helped us out. He was very knowledgeable and understanding. As we explained the issue, he right away knew what the problem was and resolved it...

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Amy Lynn L.

8/17/2022

Our radon filter stopped working. They came out right away and didn't charge any extra for coming so quickly. John and Frankie diagnosed the problem and we ordered the part. They even offered some...

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