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Top-Rated Water heater installers and replacers in New London - Updated Nov 2026

Avatar for Diamond Plumbing & Heating, LLC
Diamond Plumbing & Heating, LLC
3.7(
86
)
Water Heater - Install or Replace

Serving New London, CT and surrounding areas

Approved

Super Service Award Winner

In business since 2003

Emergency services offered

Warranties offered

"Great experience!! Amilcar and his team were efficient, respectful and very knowledgeable. They walked me through the process each step of the way, providing me with different options and really making me feel like part of the process with the installation of my ductless system. Great customer service, Amilcar was always a available when I called. I definitely recommend Diamond Plumbing for your heating, A/C or plumbing work!!"
4 High Efficiency Combi Install
Sewer main replacement
Surrey Ln
Clay sewer main replacement
Clay sewer main replacement

+13

5 neighbors recently requested a quote
Recommended by84%of homeowners
Befitting Plumbing & Heating LLC
5.0(
3
)
Water Heater - Install or Replace

Serving New London, CT and surrounding areas

Approved

In business since 2023

Free estimates

Credit card accepted

"Had a client in a multi family situation who needed a tremendous amount of existing cast iron replaced in one day. Matthew was hired to remove and replace with new pvc. Got it done in a timely manner so residents would not be down all day and could turn the water back on quickly.Would highly recommended to anyone with all plumbing repairs."
Response time2 days
Recommended by66%of homeowners
Avatar for Griswold Plumbing Services, LLC
Griswold Plumbing Services, LLC
4.6(
132
)
Water Heater - Install or Replace

Serving New London, CT and surrounding areas

In business since 2009

Emergency services offered

Credit card accepted

"I was very pleased with my experience with Griswold Plumbing, they installed a new shower faucet/showerhead and later a water treatment system. They were prompt, very professional, and courteous going the extra mile when needed. I highly recommend Griswold Plumbing and won't hesitate to call them again."
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+9

Recommended by93%of homeowners
Avatar for NEW ENGLAND SMART ENERGY
NEW ENGLAND SMART ENERGY
4.9(
13
)
Water Heater - Install or Replace

Serving New London, CT and surrounding areas

In business since 2009

Emergency services offered

"We moved into our new home three weeks ago and a home energy audit was on top of my agenda.   We had done one at our previous home and quickly saw improvements in our utility bills.
I suspect that we will see the same given the thoroughness the three member team showed.  They spent close to 3 hours plugging holes, replacing light fixtures and developing suggestions where we could see further savings.  In addition, they provided a number of rebates for added insulation, appliance replacement etc.  I would recommend to anyone.

"
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NESEG Certified Techs
Blower Door Test

+38

Recommended by91%of homeowners
Showing 1-10 of 25

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