What services does Mainline Plumbing offer?

Mainline Plumbing offers a wide range of services, including well pump repair and maintenance, water treatment and filtration, water heater installation and repair, and emergency plumbing services. They specialize in PFAS reduction systems, water quality testing, and other filtration solutions.

What sets Mainline Plumbing apart from other plumbing companies?

As a progressive, family-owned and operated business, Mainline Plumbing emphasizes trust and reliability in their services. They understand the importance of providing their customers with plumbing solutions they can trust.

Does Mainline Plumbing offer any specials or discounts?

Yes, Mainline Plumbing offers various specials and discounts on their services, which can be found on their website.

How can customers book an appointment with Mainline Plumbing?

Customers can book an appointment with Mainline Plumbing by calling the provided phone number or by using the "Book Now" feature on their website.

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Mainline Plumbing

$1.6M revenue • 8 employees • 71 Mammoth Rd, Londonderry, NH, 03053, United States

Last Updated Aug 19, 2026

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Company Overview

Company Name

Mainline Plumbing

Address

71 Mammoth Rd, Londonderry, NH, 03053, United States

Website

callmainline.com

Phone

(603) 472-5261

Approx. Annual Revenue

$1.6M

Employees

Established

2007

Google Reviews

5.0 (673 reviews)

Google Business Category

Plumber

About Mainline Plumbing

Mainline Plumbing is a well-established plumbing company based in Londonderry, New Hampshire, United States. The company has been providing a wide range of water-related services, including well pump installation and repair, water filtration and treatment, water heater installation, and emergency plumbing services, since 1992.

Business Profile

Read from the Mainline Plumbing website on Oct 12, 2026. Hover an item to see the exact wording it came from.

How Mainline Plumbing works

24/7 emergency serviceⓘ

Ownership (as declared by the business)

Family-owned

About the website

Website quality (AI-assessed): 8/10 · Current copyright 2026; Complete service and contact info

Recent changes

What changed on the Mainline Plumbing website and Google listing, as detected by Coldlytics on each visit.

Nov 3, 2026
Google reviews went from 666 to 673

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Plumbing Companies near Londonderry, NH

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Frequently Asked Questions about Mainline Plumbing

Advertising Pixels

Google Ad Pixel

Technologies Used

Social Profiles

Key Decision Makers

Dewayne Melvin Owner

John Fait Owner

John Gerbacia President