Top-rated tankless water heater installers.

Get matched with top tankless water heater installers in West Islip, NY

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

Find Tankless water heater installers in West Islip

Avatar for Patience HVAC, LLC
Patience HVAC, LLC
4.9(
30
)

Serving West Islip, NY and surrounding areas

Angi Approved

In business since 2020

Free estimates

Emergency services offered

"I am very happy that I hired Patience HVAC to replace my hot water heater. I have an oil burner and oil hot water heater. The 18 year old heater was making crackling noises and I was advised by the oil company to replace it. I wanted to convert to a gas hot water heater and tried going through Lowes. However, they only do swap outs if the existing heater is already set up for gas. So I contacted several companies for a quote. Out of all of them, Anthony was the most professional, down to earth and reasonably priced. First, he suggested to explore correcting the issue on the old heater and save me money which was impressive. I decided to proceed with a new gas heater. The quote he gave me was $800 less than the next lowest quote. Anthony sent his workers Caesar and Matt the next day which I greatly appreciated. They were both very polite and wore covers on their shoes so to avoid dirtying my house more than necessary. Anthony came later in the day to ensure everything was done correctly. He then offered to call him with any questions even if they were not pertinent to the work they performed. I am extremely impressed with patience HVAC honesty, professionalism and reasonable prices. I will be sure to recommend them to friends and family. When I am ready to install a ductless air conditioner, I will definitely contact Patience HVAC."
Peerless
Peerless Boiler with Hot Water
Annual Service
Response time4 hrs
Recommended by100%of homeowners
Avatar for Integrated Plumbing & Heating
Integrated Plumbing & Heating
4.8(
64
)

Serving West Islip, NY and surrounding areas

Angi Approved

Super Service Award Winner

In business since 2011

Free estimates

Credit card accepted

"This team installed an oil fired boiler last month. I didn't want to give a review until our oil company said it passed their inspection which it did. They came promptly. It took all day to install. They got it working. We did have a hiccup but they came and took care of it. I was nervous to use them but so glad we chose them. Roberto and his team were great. They know their stuff. So yes I highly recommend them. See the old and new."
Response time10 hrs
6 neighbors recently requested a quote
Recommended by85%of homeowners
Avatar for Varsity Home Service Company, Inc.
Varsity Home Service Company, Inc.
4.8(
197
)

Serving West Islip, NY and surrounding areas

Angi Approved

In business since 1962

Free estimates

Emergency services offered

"I called Varsity on a Sunday night when I realized I had no hot water . It was the day we had the snow storm. The next morning Sean arrived to access the issue with my very old hot water heater. He was extremely knowledgeable and gave me my options. Within a short time Jake and Anthony joined and my new water heater was installed and working. No mess , no stress. They were amazing. Sean even shoveled the skirt of my driveway when the plows came and blocked me in as I was trying to get to work. This team went above and beyond to help any way they could. My utility room look clean and the work done right. I highly recommend Varsity. I feel comfortable knowing the technicians had the right training and were really nice guys to deal with. Thanks to Erica for taking my call so late and to Christine for getting the men out so quickly the next morning. They kept me informed every step of the way. I appreciated that. "
Shower Fixtures
Installation
Truck
Best of L.I. Winner 2024
Angi 2022 Super Service Award Winner

+86

Response time11 hrs
141 neighbors recently requested a quote
Recommended by85%of homeowners
Avatar for All Weather Heating & Cooling
All Weather Heating & Cooling
4.7(
60
)

Serving West Islip, NY and surrounding areas

Angi Approved

In business since 1969

Free estimates

Emergency services offered

"They installed a minisplit cooling system, with 3 exchanges June 2021. Since then it is not operating the way it should. In my bedroom with the door closed at night on cool at 70 degrees the humidity goes up to 80%. I wake up uncomfortable, change it from cool to dry mode. The humidity will go down into the 50% range but the temperature drops down to 62 or less! So in cool or dry mode I can't get a good nights sleep! They come and look at it and tell me everything is fine. I'm going to buy a window air conditioner tomorrow which seems insane because i spent $10,000 on this minisplit AC system!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+13

Response time3 days
8 neighbors recently requested a quote
Recommended by91%of homeowners
Tri Seasonal Plumbing, Inc.
4.4(
20
)

Serving West Islip, NY and surrounding areas

Angi Approved

In business since 2025

Free estimates

Emergency services offered

"We hired this pro they demolition the bathroom upstairs and the ceiling underneath the bathroom full room ceiling gone pay them over $7,000 they requested half the money up front and have not heard from them since we hired them March 4th this is now April 5th. Watch out for this company."
Response time8 hrs
Response rate96%
10 neighbors recently requested a quote
Avatar for BERARDI ELECTRICAL CONTRACTING, INC.
BERARDI ELECTRICAL CONTRACTING, INC.
4.4(
55
)

Serving West Islip, NY and surrounding areas

Angi Approved

In business since 1999

Free estimates

Emergency services offered

"superb - professional workmanship ... from the moment we interviewed - i was confident (yet more importantly comfortable) that my home was in excellent hands ... i would NEVER use anyone else ... if you want your job done correctly - don't look any further PROFESSIONAL / KNOWLEDGABLE / HONEST / a truly talented craftsman ... a keeper - would recommend highly "
Lido beach NY
Lido beach NY
Lido beach NY
Response time6 hrs
Response rate91%
1 neighbors recently requested a quote
Avatar for Santise Plumbing & Heating, LLC
Santise Plumbing & Heating, LLC
5.0(
4
)

Serving West Islip, NY and surrounding areas

Angi Approved

In business since 2020

Small jobs welcome

Credit card accepted

"Daniel and Alex were extremely professional, friendly, and informative. They explained what was necessary to get the job done, how much it would cost, and obtained my consent. They then procured the parts, came to my home exactly when they said they would, and quickly completed the work. Upon completion, everything worked like a charm. They are knowledgeable, efficient, articulate, and friendly. They do what they say they will do when they say they will do it. I will strongly recommend them to all my friends for all their plumbing needs."
Boiler x-209
Boiler - x-209
1
2
1

+1

Response time4 hrs
Recommended by100%of homeowners
Avatar for HomeServe of Long Island
HomeServe of Long Island
5.0(
1
)

Serving West Islip, NY and surrounding areas

Angi Approved

In business since 2003

Free estimates

Emergency services offered

"Salesperson, Scott Matalevich, worked with us to get us the right air condition for our house. He was very polite and patient and wore a mask due to this Covid19 problem. The technicians, Dwayne and Keyrox did a great job in the installation of our air condition. Everything was neat and clean by the time they left the house. They worked really .hard, not even taking a long break. Also Want to put in a great word for Farrah Coppinger, from Customer Service. She went beyond her duty to get us the appointment that we wanted to install the air condition. Thanks to the team on this project!!"
High efficiency unit installation
Navien Installation
Furnace Installation
K2 Installation
Recommended by100%of homeowners
Showing 1-10 of 12

The West Islip, NY homeowners’ guide to tankless water heater installations

From average costs to expert advice, get all the answers you need to get your job done.