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Find Tankless water heater installers in West Islip

Avatar for Herber Plumbing & Heating Corp.

Herber Plumbing & Heating Corp.

4.74(
186
)
Approved Pro

Herber Plumbing & Heating Corp.

4.74(
186
)
Approved Pro
Customers say: True professional
55 years of experience
Free onsite estimate

Herber Plumbing & Heating Corp. has been trusted and recommended since 1971, and recognized for our superb service. We are family owned and operated, with guaranteed great service. Our company specializes in all types of work, but especially: Plumbing, Gas Heating, Drain Cleaning, Oil to Gas Conversions, NYS RPZ Testing to name a few things. Call & schedule your appointment today! 631-666-9315

"N/A"

Arlynn B on February 2026

Herber Plumbing & Heating Corp. has been trusted and recommended since 1971, and recognized for our superb service. We are family owned and operated, with guaranteed great service. Our company specializes in all types of work, but especially: Plumbing, Gas Heating, Drain Cleaning, Oil to Gas Conversions, NYS RPZ Testing to name a few things. Call & schedule your appointment today! 631-666-9315

"N/A"

Arlynn B on February 2026


Avatar for Patience HVAC, LLC

Patience HVAC, LLC

4.90(
30
)
Approved Pro

Patience HVAC, LLC

4.90(
30
)
Approved Pro
Customers say: True professional
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
6 years of experience

Patience HVAC was started on the premise of providing our customers honest and quality service. We understand the needs of our customers and we go a step further by helping them get an understanding of their home systems. Our technicians will guide you step by step through the service being provided, how the units work and ways to help increase energy savings and efficiency. With over 20 years in the industry, we are confident that we can meet and exceed your needs. With these ever-changing times, Patience HVAC has partnered with industry leaders in Air purification and water filtration. We will continue to expand to become the leader in residential and commercial clean air solutions, purified water, and power saving. Let me be the first to thank you for your business

"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."

Bill V on August 2024

Patience HVAC was started on the premise of providing our customers honest and quality service. We understand the needs of our customers and we go a step further by helping them get an understanding of their home systems. Our technicians will guide you step by step through the service being provided, how the units work and ways to help increase energy savings and efficiency. With over 20 years in the industry, we are confident that we can meet and exceed your needs. With these ever-changing times, Patience HVAC has partnered with industry leaders in Air purification and water filtration. We will continue to expand to become the leader in residential and commercial clean air solutions, purified water, and power saving. Let me be the first to thank you for your business

"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."

Bill V on August 2024


Avatar for Universe Home Services

Universe Home Services

4.73(
402
)
Approved Pro

Universe Home Services

4.73(
402
)
Approved Pro
Customers say: Super punctual
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
72 years of experience

Since 1954, Universe Home Services has been proudly serving the Nassau County community and customers throughout the entire region. With Universe Home Services, one call solves it all! Their highly trained technicians offer everything from heating and air conditioning to plumbing to appliance repair and electrical services on Long Island and beyond. Whether you’re dealing with an inefficient heating system, a noisy air conditioner, clogged toilet, broken dishwasher, or outdated electrical service panel, you can get the fast, affordable service you need with Universe Home Services. They go above and beyond to ensure that you’re completely satisfied with the quality of their work, offering service guarantees and parts and labor guarantees on new HVAC installations. As a family owned and operated company, Universe Home Services believes in top-quality customer service. They always treat you and your property with respect, working quickly, cleanly, and efficiently to minimize your inconvenience and leave your home in pristine condition. With more than 60 years of experience under their belt, and a commitment to unmatched quality, honesty, and expertise, Universe Home Services is the trusted name for heating, air conditioning, electrical, plumbing, and appliance repair on Long Island and beyond! Call today!

"Technician was excellent, did come around 10 PM and was a little pricey."

Hugh L on February 2026

Since 1954, Universe Home Services has been proudly serving the Nassau County community and customers throughout the entire region. With Universe Home Services, one call solves it all! Their highly trained technicians offer everything from heating and air conditioning to plumbing to appliance repair and electrical services on Long Island and beyond. Whether you’re dealing with an inefficient heating system, a noisy air conditioner, clogged toilet, broken dishwasher, or outdated electrical service panel, you can get the fast, affordable service you need with Universe Home Services. They go above and beyond to ensure that you’re completely satisfied with the quality of their work, offering service guarantees and parts and labor guarantees on new HVAC installations. As a family owned and operated company, Universe Home Services believes in top-quality customer service. They always treat you and your property with respect, working quickly, cleanly, and efficiently to minimize your inconvenience and leave your home in pristine condition. With more than 60 years of experience under their belt, and a commitment to unmatched quality, honesty, and expertise, Universe Home Services is the trusted name for heating, air conditioning, electrical, plumbing, and appliance repair on Long Island and beyond! Call today!

"Technician was excellent, did come around 10 PM and was a little pricey."

Hugh L on February 2026


Avatar for Integrated Plumbing & Heating

Integrated Plumbing & Heating

4.80(
64
)
Approved Pro

Integrated Plumbing & Heating

4.80(
64
)
Approved Pro
Super Service Award
Customers say: True professional
15 years of experience
Free onsite estimate

We're dedicated to providing our clients with the very best in service, installation, and repair for all phases of your plumbing needs. We specialize in a variety of residential and commercial services and take pride in the attention to detail put into each of the projects we're involved with. We're known for our quality work and the integrity of our business. We look forward to building long-term relationships with our clients, and guarantee your satisfaction.

"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."

Evelyn M on December 2025

We're dedicated to providing our clients with the very best in service, installation, and repair for all phases of your plumbing needs. We specialize in a variety of residential and commercial services and take pride in the attention to detail put into each of the projects we're involved with. We're known for our quality work and the integrity of our business. We look forward to building long-term relationships with our clients, and guarantee your satisfaction.

"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."

Evelyn M on December 2025


Avatar for All Weather Heating & Cooling

All Weather Heating & Cooling

4.82(
55
)
Approved Pro

All Weather Heating & Cooling

4.82(
55
)
Approved Pro
Customers say: Super punctual
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
57 years of experience

All Weather Heating & Cooling has been serving Nassau & Suffolk County of Long Island since 1969. We are now celebrating 56 years of exceeding customer expectations. All Weather provides sales, installation, service and maintenance of residential and commercial heating, air conditioning & water filtration systems.

"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!"

JIM G on June 2023

All Weather Heating & Cooling has been serving Nassau & Suffolk County of Long Island since 1969. We are now celebrating 56 years of exceeding customer expectations. All Weather provides sales, installation, service and maintenance of residential and commercial heating, air conditioning & water filtration systems.

"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!"

JIM G on June 2023


"Andre is very knowledgeable about the job. He not only fix the problem but also advise the necessary preventative action."

Victor P on April 2024

Big Plumbing and Heating, Inc., is your local contractor with over 20 years experience in taking care of all your needs. We do installs and service work for Suffolk and Nassau Counties. Call Today!

"Andre is very knowledgeable about the job. He not only fix the problem but also advise the necessary preventative action."

Victor P on April 2024


Dan's Plumbing

5.00(
7
)
Approved Pro

Dan's Plumbing

5.00(
7
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
10 years of experience

At Dan Lezcano Plumbing we pride our ourselves in quality, value, and service! We are experts in our trade and will do our best to keep you as educated as we can on your particular project. We look forward to earning your business!

"Dan made this job so simple. Very professional and punctual. I would highly recommend this company. So nice to have hot water again!!! Thanks Dan!"

Sandra M on January 2023

At Dan Lezcano Plumbing we pride our ourselves in quality, value, and service! We are experts in our trade and will do our best to keep you as educated as we can on your particular project. We look forward to earning your business!

"Dan made this job so simple. Very professional and punctual. I would highly recommend this company. So nice to have hot water again!!! Thanks Dan!"

Sandra M on January 2023


Tri Seasonal Plumbing, Inc.

4.50(
18
)
Approved Pro

Tri Seasonal Plumbing, Inc.

4.50(
18
)
Approved Pro
1 years of experience
Free onsite estimate

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.

"I called Jim for a frozen pipe, and I’m so glad i did. They responded quickly, diagnosed the issue right away, and had it repaired before it caused any further damage. The plumber was professional, courteous, and took the time to explain what caused the problem and how to prevent it in the future. Fair pricing and great service - highly recommend."

Stephen Z on February 2026

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.

"I called Jim for a frozen pipe, and I’m so glad i did. They responded quickly, diagnosed the issue right away, and had it repaired before it caused any further damage. The plumber was professional, courteous, and took the time to explain what caused the problem and how to prevent it in the future. Fair pricing and great service - highly recommend."

Stephen Z on February 2026


A Touch of Class Plumbing & Heating, Inc.

5.00(
9
)
Approved Pro

A Touch of Class Plumbing & Heating, Inc.

5.00(
9
)
Approved Pro
Super Service Award
Customers say: Quick response
25 years of experience
Free onsite estimate

With over 23 years of a local Nassau County business, my company A Touch of Class Plumbing and Heating, Inc, is your experienced best choice for all of your residential and commercial plumbing and boiler needs! I welcome all sizes of requests and enjoy installations, replacements and service work. I am an owner operated company so you can feel security and have the quality of a licensed plumber being on every job. My attention to detail and focus on customer service will set your experience with my company and your finished work apart from what any other businesses offer! I welcome maintenance, upgrade, replacement and emergency service calls 24 hours a day. Please call me, James, for a free quote today!

"Excellent company. Jim was very professional. Replaced my hot water heater and also did another job for me where he replaced a bathroom faucet. I will definitely use and recommend this company for any plumbing needs . "

Christine L on January 2026

With over 23 years of a local Nassau County business, my company A Touch of Class Plumbing and Heating, Inc, is your experienced best choice for all of your residential and commercial plumbing and boiler needs! I welcome all sizes of requests and enjoy installations, replacements and service work. I am an owner operated company so you can feel security and have the quality of a licensed plumber being on every job. My attention to detail and focus on customer service will set your experience with my company and your finished work apart from what any other businesses offer! I welcome maintenance, upgrade, replacement and emergency service calls 24 hours a day. Please call me, James, for a free quote today!

"Excellent company. Jim was very professional. Replaced my hot water heater and also did another job for me where he replaced a bathroom faucet. I will definitely use and recommend this company for any plumbing needs . "

Christine L on January 2026


Avatar for BERARDI ELECTRICAL CONTRACTING, INC.

BERARDI ELECTRICAL CONTRACTING, INC.

4.40(
55
)
Approved Pro

BERARDI ELECTRICAL CONTRACTING, INC.

4.40(
55
)
Approved Pro
Customers say: Terrific value
27 years of experience
Free onsite estimate

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!

"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 "

Thomas P on January 2026

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!

"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 "

Thomas P on January 2026

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