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Top-Rated Tankless water heater installers in East Setauket - Updated Nov 2026

Avatar for Varsity Home Service Company, Inc.
Varsity Home Service Company, Inc.
4.5(
245
)
Tankless Water Heater - Install

Serving East Setauket, NY and surrounding areas

Approved

In business since 1962

Free estimates

Emergency services offered

"Sean addressed my concerens, descaled the water heater, and ran a new condensation line. He was friendly and polite, even when working in a difficult space. Varsity has always been a company I can count on to get the job done. Five stare service every time."
Shower Fixtures
Installation
Truck
Best of L.I. Winner 2024
Angi 2022 Super Service Award Winner

+86

Response time11 hrs
118 neighbors recently requested a quote
Recommended by83%of homeowners
Avatar for N. H. Ross, Inc.
N. H. Ross, Inc.
4.7(
190
)
Tankless Water Heater - Install

Serving East Setauket, NY and surrounding areas

Approved

In business since 1976

Credit card accepted

Customers say: True professional

"Paul showed up at 8 as promised.. inspected the job an Attic Fan install & remove old unit . Did everything as he explained was needed & finished with everything completed 100% by 2 pm ! Great service hire this company they are totally professional"
Tankless
5 neighbors recently requested a quote
Recommended by90%of homeowners
Avatar for All Weather Heating & Cooling
All Weather Heating & Cooling
4.5(
70
)
Tankless Water Heater - Install

Serving East Setauket, NY and surrounding areas

Approved

In business since 1969

Free estimates

Emergency services offered

"Could not have gone smoother. Tech was very respectful of me and the house, did a fantastic installation and cleaned up everything as if they were never there. Gave me a full walk through and didn't leave until all was tested. New shut off valve, new flue, rehung expansion tank in a better location. Salesman stopped by during the installation to check on things. As it turns out, I believe they were the first to contact me as well after the listing and their price held up. All A+!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+13

Response time3 days
7 neighbors recently requested a quote
Recommended by94%of homeowners
Avatar for Mayjac Plumbing, Inc.
Mayjac Plumbing, Inc.
4.6(
15
)
Tankless Water Heater - Install

Serving East Setauket, NY and surrounding areas

Approved

In business since 2015

Small jobs welcome

Offers commercial services

"For years I have wanted to update my very old and inefficient American Standard cast iron boiler. I was very fortunate to find Mr Joe Burriesci the owner of Mayjac Plumbing who took the time to evaluate the best options, since the old boiler handled two apartments. We collectively decided to go with two Navien Combi Condensing Boilers, but the best part of the entire process was how meticulous the installation was done. From start to finish Mayjac Plumbing kept every promise and timeline made. I highly recommend Mayjac Plumbing..."
Before Installations
After installations
Whole House PVC Piping 7
Whole House PVC Piping 6
Whole House PVC Piping 5

+16

Response time10 hrs
2 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Four Points Mechanical
Four Points Mechanical
4.5(
17
)
Tankless Water Heater - Install

Serving East Setauket, NY and surrounding areas

Approved

In business since 2005

Free estimates

Emergency services offered

"Excellent! Jimmy was on-time - his work was perfect - installed new kitchen faucet and totally replaced bathroom tub/shower fixture - had to cut through sheet rock, he replaced and repaired -completely cleaned up everything. Will definitely use Four Points again and recommend them highly."
Response time8 hrs
Recommended by100%of homeowners
Avatar for BERARDI ELECTRICAL CONTRACTING, INC.
BERARDI ELECTRICAL CONTRACTING, INC.
3.7(
72
)
Tankless Water Heater - Install

Serving East Setauket, NY and surrounding areas

Approved

In business since 1999

Free estimates

Emergency services offered

"Amazing service received by Berardi. Contacted them in the evening and they responded in a few minutes and came over same evening to look at my broken gas heating system. Very knowledgeable and was quick in getting the parts needed and unit up and running again. Very impressed with them coming out evening and the following Sunday where many companies are closed. Highly recommend this company that goes above and beyond."
Lido beach NY
Lido beach NY
Lido beach NY
Response time7 hrs
Response rate100%
4 neighbors recently requested a quote
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