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

Avatar for Atlantic Water Heater Pros
Atlantic Water Heater Pros
4.8(
51
)
Tankless Water Heater - Repair

Serving Waterbury, CT and surrounding areas

Approved

In business since 1998

Free estimates

Emergency services offered

"Williams & Associates installed a Buderus oil-fired boiler and stainless-steel chimney liner. Bruce's design was a significant upgrade over my 35-year-old boiler system. He clearly explained the process and installation, and he was receptive to my questions. Bruce is knowledgeable, straightforward, and responsive. The price was very fair, considering the quality of the work and other estimates I had gotten. I would not hesitate to recommend Williams & Associates."
Large Mechanical Room
Response time1 day
Recommended by92%of homeowners
Avatar for Z Plumberz of New Haven
Z Plumberz of New Haven
4.7(
35
)
Tankless Water Heater - Repair

Serving Waterbury, CT and surrounding areas

Approved

In business since 2015

Free estimates

Credit card accepted

"Thank you HomeAdvisor! I spoke with them late on a Saturday and by Monday afternoon my new hot water heater was installed. They shopped around to get me the best price on the equipment I needed and were so kind to keep me informed as to their arrival time. They did a fantastic job getting out the old and installing the new, I am super happy!!! I would definitely recommend them! Thank you Mike and Todd!!!"
Response time2 hrs
Recommended by96%of homeowners
Avatar for Rooterman Hartford LLC
Rooterman Hartford LLC
4.0(
68
)
Tankless Water Heater - Repair

Serving Waterbury, CT and surrounding areas

Approved

In business since 2015

Free estimates

Emergency services offered

"Ash and M did a great job. Neat, courteous, professional — did great work on jacuzzi faucet replacement, including all associated plumbing. Explained everything when complete."
HVAC
248 neighbors recently requested a quote
Recommended by78%of homeowners
Avatar for P & M Plumbing, LLC
P & M Plumbing, LLC
4.3(
16
)
Tankless Water Heater - Repair

Serving Waterbury, CT and surrounding areas

Approved

In business since 2006

Free estimates

Emergency services offered

"P&M Plumbing arrived promptly and on short notice. The work was done very professionally, area left clean and orderly and the sump pump works phenomenally! I had spent 17 hours vacuuming and lugging water after the last storm, so I was thrilled at the thought of having a sump pump. We received about 3 inches of rain the next day and they even called to make sure everything was working well! In this day, it is a wonderful surprise to have a company really care about the customer and the quality of their work and I am more than delighted. Even with the 5-6 inches we received last night, I had no cleanup to do! I am highly recommending P&M!"
Plumbing
15 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Fontaine Mechanical Heating & Air Conditioning Inc
Fontaine Mechanical Heating & Air Conditioning Inc
New to Angi
Tankless Water Heater - Repair

Serving Waterbury, CT and surrounding areas

Approved

In business since 1985

Free estimates

Emergency services offered

Since 1986 Fontaine Mechanical Plumbing, Heating & Cooling has specialized in providing and maintaining quality plumbing, heating and air conditioning services for residential and commercial customers in the Bristol and surrounding areas

5 neighbors recently requested a quote
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