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Top-Rated Tankless water heater repair pros in Hamilton - Updated Nov 2026

Avatar for Christopher Viscarello Plumbing
Christopher Viscarello Plumbing
4.5(
72
)
Tankless Water Heater - Repair

Serving Hamilton, MA and surrounding areas

Approved

In business since 2016

Free estimates

Emergency services offered

"I called Viscarello Plumbing and Heating when I had a leaking water heater. Chris looked at the job and recommended a very efficient tankless water heater. I decided to make the investment. Chris and crew installed my tankless. Now, showers never run cold-hot water on demand. I use less water- warms water up so much quicker in my 110y/o house. In July, with tankless system running sinks, shower and washer, my gas bill was $20! I also really like the way the tankless was mounted on the wall. We gained more space without the old water heater in the way. Best of all- nice neat work, no leaks and no mess. Since then, Viscarello Plumbing has plumbed my new kitchen, laundry room, replaced old pipes and replaced radiator valves. Rates are average-but work is above average."
High efficient boiler
High efficient boiler
High efficient boiler
High efficient boiler
High efficient tankless

+21

1 neighbors recently requested a quote
Recommended by88%of homeowners
Avatar for Comfort Professor
Comfort Professor
5.0(
24
)
Tankless Water Heater - Repair

Serving Hamilton, MA and surrounding areas

Approved

In business since 2011

Free estimates

Emergency services offered

"Steven showed up and was able to repair our AC after two years of multiple repair companies that could not help. Everyone else said we had to replace when Steven was able to determine that it just needed a quick repair. He was professional and so pleasant. English is not our first language but he was so patient with us. Highly recommend!"
10 neighbors recently requested a quote
Avatar for Borels Plumber Inc
Borels Plumber Inc
5.0(
11
)
Tankless Water Heater - Repair

Serving Hamilton, MA and surrounding areas

Approved

In business since 2018

Free estimates

Warranties offered

"These guys are great. Water heater broke and was leaking all over the cellar. They replaced my water heater and had everything done within a couple of hours. Highly recommend them and I will definitely use them again."
Water heater replacement
Water heater replacement
Bathroom remodeling
Bathroom remodeling
Kitchen remodeling

+4

Response time2 hrs
Response rate100%
Avatar for Maffei Plumbing and HVAC, LLC
Maffei Plumbing and HVAC, LLC
3.8(
12
)
Tankless Water Heater - Repair

Serving Hamilton, MA and surrounding areas

Approved (Corporate)

In business since 2010

Free estimates

Emergency services offered

At Maffei Plumbing and HVAC, LLC, we are committed to your comfort. With an experienced and qualified staff to provide quick service for any service needed. We can solve any problem with a friendly face. Give us a call for a free estimate.

Air Conditioning Installation
Rinnai Tankless
Water Filtration
Heating Systems
Heating Systems

+6

Response time1 day
59 neighbors recently requested a quote
Recommended by12%of homeowners
Avatar for Belmonte Plumbing & Heating
Belmonte Plumbing & Heating
4.9(
6
)
Tankless Water Heater - Repair

Serving Hamilton, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Customers say: True professional

"Nick installed two faucets which I'd previously bought and a couple of water hammer arresters on my washing machine. He was professional, on time, and very well organized! His initial estimate was great and that is what he charged. Very reasonable and professional. Several other plumbing companies had proposed dramatically different and higher estimates. It’s good to see there are quality people in the trade who don’t try and charge exorbitant prices."
Response time8 hrs
3 neighbors recently requested a quote
Recommended by33%of homeowners
Avatar for NETR Inc
NETR Inc
4.7(
78
)
Tankless Water Heater - Repair

Serving Hamilton, MA and surrounding areas

In business since 1989

Free estimates

Emergency services offered

For emergency services, please call 781-933-6387.\n\nN.E.T.R., Inc. is here to help homeowners install the best heating and cooling systems that fits their needs. Since 1989, we’ve installed heating and cooling systems in Boston and its surrounding areas, tackling tough problems that our clients face.\n\n Our goal is to ensure our clients have energy efficient, quiet, reliable systems so they can live their lives to the fullest both at home and at work.\n\nOur dedication to our customers’ needs is what drives us each and every day. Our approach to temperature control and comfort has helped us become one of the most respected names in heating, cooling, and refrigeration in New England

SOUTH END CONDO RECEIVES MITSUBISHI DUCTLESS SYSTEM
SOUTH END CONDO RECEIVES MITSUBISHI DUCTLESS SYSTEM
SOUTH END CONDO RECEIVES MITSUBISHI DUCTLESS SYSTEM
Additional Photos
Additional Photos

+9

3 neighbors recently requested a quote
Recommended by91%of homeowners
Avatar for Sila Heating, Cooling, Plumbing and Electrical
Sila Heating, Cooling, Plumbing and Electrical
4.5(
5,405
)
Tankless Water Heater - Repair

Serving Hamilton, MA and surrounding areas

In business since 1989

Free estimates

Emergency services offered

"I've called Sila before to work on my HVAC unit and realized they offer plumbing services when my tank-less water heater stopped working. They were able to come by that day I called to see what was wrong. Once they were onsite they deterimed my hot water valve stopped working and were able to replace it and got my hot water working in no time."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+6

Response time2 days
Response rate100%
8 neighbors recently requested a quote
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