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

Avatar for Champion Plumbing & Heating
Champion Plumbing & Heating
4.8(
45
)
Tankless Water Heater - Repair

Serving West Islip, NY and surrounding areas

Approved

In business since 2000

Emergency services offered

Small jobs welcome

"I used champion plumbing and heating to replace my hot water heater in an emergency. I was completely amazed at how fast they are. Steve and crew where at my house with a new heater in less then two hours. My emergency was fixed a new hot water heater was installed and I had hot water in less then hour and a half after their arrival. My experience was great with Champion they were fast,neat, Clean, knowledgeable and professional. I would highly recommend Steve to everyone . I also have to mention the cost was less then I expected and very reasonable. Thanks again Champion heating and plumbing."
14 neighbors recently requested a quote
Recommended by71%of homeowners
Avatar for Mr. Big Plumbing & Heating
Mr. Big Plumbing & Heating
4.9(
15
)
Tankless Water Heater - Repair

Serving West Islip, NY and surrounding areas

Approved

In business since 2022

Free estimates

Warranties offered

"They were friendly, experienced and attentive to our concerns. They also provided critical advise/information as to our overall plumbing needs including competitive cost estimates."
Response time1 day
Response rate90%
Recommended by100%of homeowners
Avatar for All Weather Heating & Cooling
All Weather Heating & Cooling
4.5(
70
)
Tankless Water Heater - Repair

Serving West Islip, NY and surrounding areas

Approved

In business since 1969

Free estimates

Emergency services offered

"After contracting the installation, the company performed 2 walkthroughs to determine the BEST way to complete the installation. They determine the installation would take two days. The installation crew arrived early on both days. The installers and their work were neat and clean. They cleaned up after the installation, including vacuuming in the house. Dave, the chief installer, treated our house as if it was his. The equipment works as advertised. We could not be more satisfied with the work. From the first meeting to the last equipment check, VERY professional. The pictures show the compressor installed on the roof attached to the chimney, and the main inside unit installed between two windows."
Additional Photos
Additional Photos
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Additional Photos
Additional Photos

+13

Response time3 days
7 neighbors recently requested a quote
Recommended by94%of homeowners
Avatar for BERARDI ELECTRICAL CONTRACTING, INC.
BERARDI ELECTRICAL CONTRACTING, INC.
3.7(
72
)
Tankless Water Heater - Repair

Serving West Islip, NY and surrounding areas

Approved

In business since 1999

Free estimates

Emergency services offered

"Leo and his crew were true professionals. Excellent service and true attention to detail. Not only was the project done promptly and correctly, but it was a thing of beauty as well. I highly recommend Barardi Electrical."
Lido beach NY
Lido beach NY
Lido beach NY
Response time7 hrs
Response rate100%
4 neighbors recently requested a quote
Avatar for Handy Hubby
Handy Hubby
3.3(
43
)
Tankless Water Heater - Repair

Serving West Islip, NY and surrounding areas

Approved

In business since 2000

Free estimates

Emergency services offered

"Handy Hubby Steve repaired cement stairs and installed a new outside back door. He did an awesome job. Steve was always on time and made sure everything was done properly. His prices were very reasonable. Great personality. Very personable. I will definitely use him in the future for any other repairs I need done."
Stand Alone  Structure
Painted wood porch
Large deck and covered area
Large deck and covered area
Before - Pad removed

+5

Recommended by78%of homeowners
Avatar for Energywise, Inc.
Energywise, Inc.
1.0(
1
)
Tankless Water Heater - Repair

Serving West Islip, NY and surrounding areas

Approved

In business since 1985

Emergency services offered

Warranties offered

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumers needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

Response time2 hrs
HomeServe of Long Island
2.5(
1
)
Tankless Water Heater - Repair

Serving West Islip, NY and surrounding areas

Approved

In business since 2003

Free estimates

Credit card accepted

HomeServe Energy Services (HES) provides reliable heating and cooling experts that service over 1,000 communities in 26 counties across New York, Massachusetts and Rhode Island, from five “depot” sites supporting metro New York, southern New Jersey, Rhode Island and eastern Massachusetts. With almost 200 technicians (including certified refrigerant handling technicians and NATE-certified technicians), HomeServe provides emergency heating, cooling and water heater repairs as well as tune-ups and new equipment installations. \n

Tri Seasonal Plumbing, Inc.
New to Angi
Tankless Water Heater - Repair

Serving West Islip, NY and surrounding areas

Approved

In business since 2025

Free estimates

Credit card accepted

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction, from the start to the completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job. \n

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