Endless hot water and lower energy bills with a properly sized tankless system. Local plumbers serving Londonderry and Rockingham County — open 24/7 with upfront pricing.
(888) 480-9811MJA Plumbing and Heating is the trusted choice for tankless water heater installation in Londonderry, New Hampshire. Homeowners in Londonderry and nearby Litchfield, Derry, Windham rely on our plumbers for same-day service, honest pricing and work that lasts. Endless hot water and lower energy bills with a properly sized tankless system. Call (888) 480-9811 to schedule tankless water heater installation in Londonderry today.
Tankless water heaters heat water on demand, so you never run out and never pay to keep 50 gallons hot all day. MJA Plumbing and Heating sizes the unit for New Hampshire's cold incoming water, installs gas and venting correctly, and sets it up for years of trouble-free service.
A real person picks up day or night, and an emergency plumber is dispatched immediately.
You get the price in writing before we start. No surprises on the invoice.
Most repairs finish on the first visit because the parts are already on the truck.
Our plumbers live and work in the communities we serve and know the local water and winters.
Shoe covers, drop cloths and a tidy job site every time.
If a repair we made fails, we come back and make it right.
Cold NH groundwater matters — an undersized tankless unit will disappoint. We size for winter.
We provide tankless water heater installation throughout Londonderry and the neighboring towns of Litchfield, Derry, Windham, Merrimack, Manchester, Auburn.
“Third plumber we tried — the first two couldn't find the leak. MJA found it in twenty minutes.”
Linda P.“They cleared a sewer line that had backed up twice with other companies. Camera showed the roots. Done right.”
Tom & Sue B.“Tankless install was clean and the tech walked me through the settings. Hot water never runs out now.”
Marcus J.We offer same-day tankless water heater installation in Londonderry and 24/7 emergency response. Call (888) 480-9811 and we will give you an arrival window right away.
You get an upfront, written price before any work starts. There are no overtime charges for nights, weekends or holidays.
Yes — we cover all of Rockingham County including Litchfield, Derry, Windham, Merrimack.
Emergency plumbers on call 24 hours a day across New Hampshire. Upfront pricing, same-day service.
(888) 480-9811