Business Details
34 Years
experience
Emergency
services
Trusted Plumbing Services in Londonderry, NH
Mainline Plumbing & Heating has been serving New Hampshire with trusted plumbing solutions since 1992. As a family-owned and operated business, we prioritize reliability, trust, and customer satisfaction. Our team includes licensed NH Master Plumbers and state-approved apprentices who deliver expert services for well pumps, water heaters, and filtration systems. With over three decades of experience, we specialize in addressing water pressure issues, PFAS contamination, radon removal, and emergency plumbing repairs. Our commitment to a drug-free workplace and professional excellence ensures every client receives high-quality, code-compliant solutions tailored to their needs. 
Services
Well Pump Repair
Water Filtration
Water Heaters
PFAS Reduction
Emergency Plumbing
Details
- Year established: 1992
Highlights and features
- Family-owned business serving New Hampshire since 1992
- Licensed NH Master Plumbers and state-approved apprentices
- Emergency services available for urgent water issues
- Participants in NH state rebate program for water systems
- Specialized in PFAS reduction and contaminant removal systems
Associations and certifications
- NH Master Plumber 3072
- NH Pump Installer 1678
- NH Gas Fitter GFE0801924
What people say
Quick professional service
No extra charges
Knowledgeable staff
Free system installation
Same-day repairs
Services
Well Pump Repair
Specializing in jet and submersible well pump repairs, our licensed technicians diagnose and resolve issues like low pressure, cloudy water, and system failures. We provide emergency replacements and maintenance for residential systems, ensuring reliable water access. Our expertise includes matching pump types to well depth and water quality requirements.
Water Filtration
We install and maintain whole-home filtration systems addressing PFAS, arsenic, radon, and bacterial contamination. Our solutions include water softeners and iron filters that improve taste, eliminate odors, and prevent fixture damage. Systems qualify for NH state rebates, offering eligible homeowners free installations through our partnership program.
Water Heater Services
From traditional tank to tankless models, we handle gas and electric water heater installations, repairs, and maintenance. Our $59 tune-up service extends system life, while emergency repairs address leaks, pressure issues, and complete failures. All work includes safety checks and code compliance verification.
PFAS Reduction Systems
Our certified systems target per- and polyfluoroalkyl substances in drinking water. Using state-approved technology, we install point-of-entry filtration that meets NH Department of Environmental Services standards. The process includes water testing, system selection, and state rebate coordination for eligible customers.
Emergency Plumbing
Available for immediate response to burst pipes, complete water loss, and critical system failures. Our team addresses flooding, pressure tank ruptures, and contamination emergencies with 2-hour response times during operating hours. Services include temporary fixes and permanent solutions to prevent future issues.
People
John Fait
General Manager
Third-generation master plumber with 10+ years of leadership experience. Specializes in well pump diagnostics, water treatment systems, and emergency plumbing solutions. Holds NH Master Plumber, Pump Installer, and Gas Fitter certifications. Manages team operations and customer service initiatives.
Questions
Do you offer emergency plumbing services?
Yes, we provide urgent response for water loss, burst pipes, and system failures during our operating hours with priority scheduling.
Are water filtration rebates available?
Yes, we participate in NH's state rebate program allowing qualified homeowners to receive whole-house filtration systems at no cost.
What well pump types do you service?
We handle both jet pumps for shallow wells and submersible pumps for deeper water sources with repair and replacement options.
Do you install tankless water heaters?
Yes, we offer energy-efficient tankless water heater installations with expert setup and maintenance services for residential properties.
How do PFAS filtration systems work?
Our systems use activated carbon and ion exchange technology to remove PFAS compounds, with state-certified installation and testing processes.
What service areas do you cover?
We primarily serve Londonderry and surrounding areas of Southern New Hampshire with comprehensive plumbing solutions.
