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Top-Rated Tankless water heater installers in Uniondale - Updated Nov 2026

Avatar for 5DS Plumbing and Heating
5DS Plumbing and Heating
4.6(
70
)
Tankless Water Heater - Install

Serving Uniondale, NY and surrounding areas

Approved

In business since 2013

Free estimates

Credit card accepted

"Replaced hot water tank with tankless gas fired system. Easy to work with, answered all questions and did a good job in 1 day. Hot water back in a few hours of their arrival. Thanks to Paul and Syed."
Response time2 hrs
Response rate94%
2 neighbors recently requested a quote
Barnagat Plumbing Inc
4.7(
212
)
Tankless Water Heater - Install

Serving Uniondale, NY and surrounding areas

Approved

In business since 1980

Free estimates

Emergency services offered

"Barbara graciously took a look at the leak when she came by to give us an estimate for a whole house water filter install. We called her back a week later to fix the leak. Barbara showed up on time and was up front about how she planned to fix the problem, any additional costs should the planned approach didn't work, and other alternatives. She was able to fix the leak in 30 mins and we no longer have to worry about water behind the walls."
Response time1 day
Response rate100%
Recommended by95%of homeowners
Avatar for Varsity Home Service Company, Inc.
Varsity Home Service Company, Inc.
4.5(
245
)
Tankless Water Heater - Install

Serving Uniondale, NY and surrounding areas

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
121 neighbors recently requested a quote
Recommended by83%of homeowners
Avatar for Premier HVAC Services
Premier HVAC Services
4.3(
229
)
Tankless Water Heater - Install

Serving Uniondale, NY and surrounding areas

Approved

Super Service Award Winner

In business since 2016

Free estimates

Emergency services offered

"I had a great experience with Premier HVAC replacing my old and leaking water heater. I was impressed that they were able to respond quickly and start working on the same day as my call, especially given the severely cold weather and other plumbers being busy replacing freezing pipes. The plumber was able to work with my very tight kitchen space and narrow hallways, and without having to remove the countertop in my kitchen. I am satisfied with the installation and would definitely consider Premier HVAC for future plumbing needs."
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+38

Response time1 day
Response rate100%
1 neighbors recently requested a quote
Avatar for All Weather Heating & Cooling
All Weather Heating & Cooling
4.5(
70
)
Tankless Water Heater - Install

Serving Uniondale, NY and surrounding areas

Approved

In business since 1969

Free estimates

Emergency services offered

"I called All Weather to give me a quote for replacing my gas boiler. They set up a time for their salesperson to come over and give me a quote. The appointment was only a few days later and a man named Joe showed up on time. He spent some time with me, I told him I was looking for a new boiler and a new hot water heater, but I wanted to see what options I have (since I was debating going to a tankless water heater). He told me going indirect hot water tank is the best option and they always use this brand that's the "best one out there". Even though he may have been right, he didn't tend to my questions or concerns very well. I felt like he was getting annoyed that I had questions and eventually I just let him run the show just to get him out of my house faster. Especially when he gave me a quote of $8600, it was much higher than I was anticipating. One thing I really didn't like was when he said I'd have to get a permit since I live in an incorporated village, which would be an extra $500, meanwhile I already had another plumber tell me a permits only $200. So I went with another company. So even though I can't rate All Weather on their work quality, I didn't get a good feeling from their salesperson."
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+13

Response time3 days
7 neighbors recently requested a quote
Recommended by94%of homeowners
Avatar for Advanced Professional Management, LLC
Advanced Professional Management, LLC
4.2(
939
)
Tankless Water Heater - Install

Serving Uniondale, NY and surrounding areas

Approved

In business since 1999

Emergency services offered

Warranties offered

"This was probably my best experience on Angie's List. I woke up and noticed there was no hot water in the house. Went to the basement and noticed the hot water heater was leaking. I called up Advanced Professional Plumbing, told them what was going on and gave them the specs of the hot water heater. 20 minutes later a technician showed up (a very nice guy named Joey). He inspected everything and showed us the cause of the issue. He gave us a few options on what to do and we decided to replace the 75 gallon hot water heater. Within an hour, Joey came back with Sam and they replaced the old water heater with a new one. They were both professional and got the old hot water heater without making a mess and replaced with a new one. After the job was done, Joey tested all the bathrooms out to make sure the pressure was good and we paid and they were on their way. They were fast, efficient, explained everything and it was a great price. You really can't beat that. Your hot water heater breaks down on a Saturday you are not expecting hot water for the rest of the weekend but Advanced Professional Plumbing delivered. I appreciated the office following with me to make sure everything went. Just an overall class business."
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+33

Response time11 hrs
Response rate100%
8 neighbors recently requested a quote
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