--- title: "Mainline Plumbing" url: https://contractorlink.pro/mainline-plumbing trades: [Plumbing] city: Londonderry region: NH google_rating: 5.0 google_rating_count: 574 website: "https://callmainline.com/" phone: "(603) 472-5261" license: All rights reserved. Content from ContractorLink. --- # Mainline Plumbing > Your Water Is Our Business ## About Mainline Plumbing is a family-owned and operated business serving Londonderry, NH and surrounding areas since 1992 with trusted plumbing solutions. Their highly-trained team of licensed plumbers and apprentices specializes in well pumps, water filtration, treatment, and water heaters to ensure clean, safe water for homeowners. They address contaminants like PFAS, arsenic, radon, uranium, and bacteria, and offer whole-home water softeners for hard water issues. As a vendor for New Hampshire's rebate program, they provide free whole-house drinking systems to qualified customers. ## Trades - Plumbing ## Services - Well Pump Maintenance & Repairs - Water Filtration & Treatment - PFAS Filtration - Water Heater Installation, Repairs & Maintenance - Constant Water Pressure Systems - Plumbing Services - Whole-Home Water Softeners - Residential Water Purification ## Location Londonderry, NH, 03053 ## Service Area Serves within 30 minutes drive time of Londonderry, NH. **Phone**: (603) 472-5261 ## Google Reviews 5.0/5 stars from 574 Google reviews. [View on Google Maps](https://maps.google.com/?cid=12578007188900900829&g_mp=CiVnb29nbGUubWFwcy5wbGFjZXMudjEuUGxhY2VzLkdldFBsYWNlEAIYBCAA) - 5/5 — Anonymous I called Mainline hoping to get some answers on an outdated and out of code hot water system. John came out same day and walked through my options with me. The next day, John's team came out and had a brand new water heater and all new piping installed in just a few hours! No more polybutylene!! I would recommend this company for anyone in need of plumbing help. - 5/5 — Anonymous We have used Mainline a number of times. Most recently we worked with John, Mike and Justice on the installation of a new well pump and home water filtration system. They were quick to evaluate our issue, offered reasonable pricing, and explained everything that needed to be done. They could not have been more professional and easy to work with. I highly recommend using Mainline for all your plumbing needs! - 5/5 — Anonymous Conner and George were exceptional! They came in with everything they needed, and cleaned up afterwards! They were able to help fix our plumbing issues very fast, and when they noticed how hard our water was they were able to test it on the spot! They were able to explain what they found, and I understood what they were saying.. They are a wonderful company and we highly recommend them! Thanks for providing wonderful service! - 5/5 — Anonymous Had water heater issue "Stinky" hot water, it was gross! John and George came out - corrected the issue and made some updates to make sure system continued to work as it should. They explained things to me, in layman's terms of course, which was very much appreciated ! I knew I was in good hands. They were my Hero's today! I would not hesitate to use Mainline Plumbing again and will highly recommend them to anyone who may need their services ! - 5/5 — Anonymous Called mainline plumbing on a whim needing a leak repaired. Called at 8AM and by 1PM that day they were over fixing the issue. Their prices are beyond reasonable. After they fixed my leak I asked about the water filtration systems they put in. Long story short 3 weeks later they are over installing a new system for me. Mike and Connor were beyond professional and the owner John has gone above and beyond for me between checking in on me after the install to make sure everything looked good for me. This is my first time ever hiring a plumber and i know who I will always call for issues at my house! ## FAQ **Q: What service areas does Mainline Plumbing cover for well pump and water treatment services?** A: Mainline Plumbing serves Londonderry, NH, and the surrounding areas in southern New Hampshire. Our team of licensed NH Master Plumbers and state-approved apprentices provides reliable well pump maintenance, repairs, and water filtration solutions throughout this region. Whether you're dealing with low water pressure or contaminants like PFAS, we ensure prompt service in your local area. **Q: How experienced is Mainline Plumbing in well pump services in Londonderry NH?** A: Since 1992, Mainline Plumbing has been a trusted family-owned business specializing in well pump maintenance and repairs in Londonderry and surrounding areas. Our highly trained professionals, including licensed NH Pump Installers, handle everything from constant water pressure systems to troubleshooting no-water issues. With over three decades of experience, we deliver exceptional results for residential well systems. **Q: Does Mainline Plumbing offer PFAS filtration and water treatment in New Hampshire?** A: Yes, Mainline Plumbing specializes in PFAS filtration and comprehensive water treatment services to remove contaminants such as per- and polyfluoroalkyl substances, arsenic, radon, uranium, and bacteria from your home's water supply. We provide high-quality whole-home water softener solutions and filtration systems designed for safe, clean drinking water. As a vendor for the state of New Hampshire’s rebate program, qualified homeowners may receive a whole-house drinking system at no cost, with over 100 installations completed since 2023. **Q: What water heater services does Mainline Plumbing provide in Londonderry NH?** A: Mainline Plumbing offers installation, repairs, and maintenance for a variety of water heaters, including traditional tanked gas and electric models as well as on-demand tankless units. Our experienced team ensures your system meets all current codes and provides reliable hot water when you need it. If you're experiencing no hot water or require routine servicing, we handle it efficiently to restore functionality. **Q: Is Mainline Plumbing involved in the New Hampshire state rebate program for water filtration?** A: Mainline Plumbing is proud to be a vendor for the state of New Hampshire’s rebate program, which allows qualified homeowners to receive a whole-house drinking water system at no cost. Since the beginning of 2023, we have installed free systems for over 100 customers, including PFAS filtration to ensure safe water. Our team guides you through the eligibility process, testing, installation, and reimbursement documentation. **Q: What is the process for scheduling plumbing repairs with Mainline Plumbing?** A: To schedule plumbing repairs, water heater service, or well pump maintenance, contact us at (603) 472-5261 or use our online request form, specifying issues like no water, low pressure, or PFAS concerns. Our team, consisting of licensed NH Master Plumbers and Gas Fitters, will promptly assess your needs and provide a solution tailored to your residential system. We operate Monday through Friday from 6:00am to 6:30pm and Saturdays from 6:00am to 2:00pm, ensuring quick response times in Londonderry and surrounding areas. **Q: Why choose Mainline Plumbing for water filtration systems in southern New Hampshire?** A: As a progressive, family-owned business since 1992, Mainline Plumbing employs highly trained, licensed professionals committed to a drug-free workplace and exceptional service. We specialize in advanced water filtration for contaminants like PFAS and hard water issues using whole-home softeners and treatment systems. Our dedication is evidenced by participation in the NH rebate program and positive customer testimonials praising our efficient installations and reliable results. ## Online Presence - Website: https://callmainline.com/ - Google Maps: https://maps.google.com/?cid=12578007188900900829&g_mp=CiVnb29nbGUubWFwcy5wbGFjZXMudjEuUGxhY2VzLkdldFBsYWNlEAIYBCAA --- Profile: https://contractorlink.pro/mainline-plumbing