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

Avatar for Proficient Plumbing & Heating
Proficient Plumbing & Heating
4.9(
309
)
Tankless Water Heater - Install

Serving Allentown, NJ and surrounding areas

Approved

In business since 2010

Free estimates

Emergency services offered

"Proficient Plumbing is my go to contractor for all of my plumbing needs at home. Paul and his crews have always done a fantastic job. I have hired Proficient Plumbing for many different kinds of work from drain cleaning and sewer line cleaning to installations and repairs of faucets, hoses, etc. Every time, the work is done as promised, on time and with no concerns. Prices are fair, communication is great and overall service is excellent. I don’t hesitate to use Proficient Plumbing when I need them, and neither should you."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+74

Recommended by97%of homeowners
Avatar for Just In Case Plumbing & Heating LLC
Just In Case Plumbing & Heating LLC
5.0(
59
)
Tankless Water Heater - Install

Serving Allentown, NJ and surrounding areas

Approved

Super Service Award Winner

In business since 2022

Warranties offered

Credit card accepted

"Alec from Aqua Sewer & Drain Service very professional when he showed up to check the water leak we had. Alec diagnosed the issue and said we needed an expansion tank since it cracked and that’s where all the water was leaking from. He said we don’t need a water heater because that is functioning properly. He took some pictures and then went to get the parts and came back within 30 mins and started the work. You can tell he really knew what he was doing. He had all the right tools in his work truck. He removed the old expansion tank and put in the new expansion tank and a shut off valve and he also strapped the expansion tank so it got added support. He also check the water pressure and looked for leaks before he left. We had this issue Friday night around 11pm and we call his company Saturday morning and he should up at 8am. It took about 2 hours before he finished. Alec was very knowledgeable, he also wore booties on his shoes in our house. I would recommend Aqua Sewer & Drain Services to anyone who has any plumbing issues. We live in South Brunswick NJ."
Plumbing Project
Plumbing Project
Before
Basement Bathroom
Water Heaters Project

+14

Recommended by45%of homeowners
Avatar for Arctic Air Conditioning
Arctic Air Conditioning
4.8(
867
)
Tankless Water Heater - Install

Serving Allentown, NJ and surrounding areas

Approved (Corporate)

In business since 1977

Free estimates

Emergency services offered

"Very grateful for such an easy and pleasant experience when I suddenly found my very old hot water heater leaking all over the basement floor on a Sunday evening. I did a quick panicked search and thankfully Arctic answered my call and put me at ease with a quote for a replacement and an install appt for first call the next morning. Adam K arrived on time, was very sweet & professional, and installed our new unit in under an hour. Will definitely use Arctic again!"
photos
photos
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photos

+6

14 neighbors recently requested a quote
Recommended by96%of homeowners
F.S. Plumbing, Heating, & General Contracting, Inc.
4.6(
145
)
Tankless Water Heater - Install

Serving Allentown, NJ and surrounding areas

Approved

In business since 2002

Free estimates

Emergency services offered

"Very professional kept us informed from the start was able to replace a AC; furnace; hot water heater and fix a toilet all in one day! Done before my wife got home at five pm. Very friendly and best price point out of five quotes, I would recommend."
Rinnai Recirculation 95% efficient Tankless
Another Old tank style heater sent to the junkyard
Response time1 day
Recommended by83%of homeowners
Avatar for Mr Fixit Plumbing/ CNJ Home Services
Mr Fixit Plumbing/ CNJ Home Services
4.9(
91
)
Tankless Water Heater - Install

Serving Allentown, NJ and surrounding areas

Approved

Super Service Award Winner

In business since 2004

Free estimates

Emergency services offered

"If you’re looking for a top-notch plumber who tells it like it is and goes the extra mile, Anthony at Mr. Fix It is your go-to professional! I recently had three major plumbing concerns: fixing a toilet leak, creating a permanent dehumidifier solution for my basement, and replacing my water heater. Anthony handled all of these tasks with exceptional skill and dedication. One of the standout aspects of working with Anthony is his honesty. He’s straightforward and transparent about what needs to be done and how it will be achieved. This level of clarity is incredibly refreshing and reassuring. In addition to his expertise, the pricing was very fair and highly competitive. Compared to more corporate plumbing establishments, his rates are not only reasonable but also offer great value for the quality of work provided. Anthony also answered all my questions, including those related to electrical work, as he’s also an electrician. His broad knowledge base and willingness to share his expertise are truly impressive. Rob is incredibly responsive, even taking calls while on vacation, which highlights the efficiency of his operation. Anthony stayed late to ensure the job met my high standards and went above and beyond to ensure everything was perfect. If you need plumbing work, request Anthony at Mr. Fix It—he’s the best in the business. I wouldn’t hesitate to hire him again for any future needs. I highly recommended!"
Mrfixit CNJ made a Complete transformation of my bathrooms with True quality & comfort in mind.
The lights & Rainhead really make this bathroom
Additional Photos
Additional Photos
Additional Photos

+48

Response time9 hrs
4 neighbors recently requested a quote
Recommended by97%of homeowners
Avatar for Under Pressure Plumbing, LLC
Under Pressure Plumbing, LLC
5.0(
5
)
Tankless Water Heater - Install

Serving Allentown, NJ and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

I am a lifelong plumber, working as a plumber for over 15 years. Finally able to go out on my own and start my own business after many years of hard work. Full licensed and insured. Full service plumbing company. Our prices are very reasonable and affordable. Honesty, transparency, trustworthiness are our top characteristics! We offer same day, next day, and emergency or off hour service.

Bath remodel
Bath remodel
Bath remodel shower
Double vanity
1 neighbors recently requested a quote
Avatar for AJ Perri, LLC Plumbing
AJ Perri, LLC Plumbing
3.8(
479
)
Tankless Water Heater - Install

Serving Allentown, NJ and surrounding areas

Approved (Corporate)

In business since 1971

Credit card accepted

Customers say: True professional

"We had several different technicians working on installing a new water heater in a crawl space. There were several different unexpected occurrences that arose, but the guys were great. They were respectful, curious, helpful, understanding, knowledgeable and extremely patient explaining our oppositions. They were responsive and prompt to some unexpected situations. Highly recommend them, I'm giving the technicians ten stars for their professional and respectful work ethics."
New System Installation
Drain Repair
Response time8 hrs
Recommended by74%of homeowners
Avatar for Air Experts Heating, Air & Plumbing LLC
Air Experts Heating, Air & Plumbing LLC
4.3(
72
)
Tankless Water Heater - Install

Serving Allentown, NJ and surrounding areas

Approved (Corporate)

In business since 1979

Emergency services offered

Warranties offered

Air Experts is a trusted service provider in heating, air conditioning, and plumbing. Our courteous plumbing technicians are available 24/7 to provide you with expert service and repair. Our Comfort Advisors are ready to help you make the most effective installation or replacement decisions based on your home comfort needs. We are licensed and insured Estimates provided before work begins Major credit cards accepted. 100% financing with approved credit Residential and Commercial.

Clearing a Clogged Drain
6 neighbors recently requested a quote
Recommended by77%of homeowners
Avatar for Express Plumbing Service
Express Plumbing Service
4.6(
339
)
Tankless Water Heater - Install

Serving Allentown, NJ and surrounding areas

Approved (Corporate)

In business since 2007

Free estimates

Credit card accepted

"They responded immediately, set up an appointment at my convenience, showed up on time,fixed my problem promptly. There was another plumbing problem I had, they contacted their supplier went to get the parts came back & installed it. I was very pleased with their service."
Water Heaters
Water Heaters
Water Heaters
Water Heaters
Water Heaters

+1

1 neighbors recently requested a quote
Recommended by96%of homeowners
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