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Top-Rated Tankless water heater repair pros in Wallingford - Updated Nov 2026

Avatar for Mattioni Plumbing, Heating & Cooling
Mattioni Plumbing, Heating & Cooling
4.5(
341
)
Tankless Water Heater - Repair

Serving Wallingford, PA and surrounding areas

Approved

In business since 1948

Emergency services offered

Warranties offered

"My initial contact with Mattioni was to simply schedule a winter check-up on the furnace in our new house. I knew the furnace, a/c, and water heater were all about 11 years old and could be in need of replacement. One month later, I’ve had Mattioni replace all three and also perform some smaller plumbing jobs after the annual healthy home plumbing inspection they offer as part of their contract program (which came free for one year after I had the furnace and a/c installed). They’ve done too much work for me to go into detail on every aspect of every job they did, but, on the whole I have been very impressed with Mattioni. Their customer service, quality, and attention to detail seems top notch. If you’re just comparing prices, they’re probably not the cheapest contractor to use, but if you factor in the quality of the service they’re providing, I think their prices are very good, which is why I rated them A in this regard. As with any big jobs like installing a furnace or water heater, small hiccups can occur - in fact, a week after the furnace was installed and I had the plumbing inspection, a small gas leak was detected. After the hot water heater was installed, one of the fittings in the pipe that leads into the water heater leaked a small amount of water and set off the alarm they installed. In my view, small hiccups like this are to be expected when new installations occur. Where Mattioni really shined was in their response to these problems. In particular, I would recognize Jared C., the plumber who did most of our plumbing work. He noticed the small gas leak and had one of the HVAC techs sent out within several hours to address it. He also returned the late the same day he had installed the hot water heater to correct the small leak that had resulted from a defective fitting. I found his attention to detail and willingness to help my wife troubleshoot over the phone and then return late after a long day and fix the small problem to be exemplary customer service. On the whole, I highly recommend Mattioni. If you’re just interested in finding the contractor with the lowest price, Mattioni is probably not going to be your preferred contractor (although they were willing to match lower quotes I received on the hot water heater install). If you’re looking for an HVAC or plumbing company that has responsive and friendly customer service, technicians that pay attention to detail and treat your house as your own, and will ensure that the job is done both correctly and with a high degree of quality, Mattioni seems to be one of the best I’ve used in my years as a homeowner. They will certainly be my go-to plumber and HVAC company for the foreseeable future."
Additional Photos
Additional Photos
Additional Photos
Response time2 days
13 neighbors recently requested a quote
Recommended by85%of homeowners
Avatar for Delaware Plumbing Professionals, LLC
Delaware Plumbing Professionals, LLC
4.7(
459
)
Tankless Water Heater - Repair

Serving Wallingford, PA and surrounding areas

Approved

Super Service Award Winner

In business since 2013

Emergency services offered

Warranties offered

"I worked closely with the manager regarding my water heater purchase/ install, he was very accommodating. Steve did the removal and install of the water heater and he did an excellent job, very professional and great customer service!"
trade show
new water conditioner
sewer line replacement
well to public water conversion
water conditioner

+4

Response time40 mins
397 neighbors recently requested a quote
Recommended by90%of homeowners
Avatar for Horizon Services, LLC (DE)
Horizon Services, LLC (DE)
3.8(
1,316
)
Tankless Water Heater - Repair

Serving Wallingford, PA and surrounding areas

Approved

In business since 1989

Free estimates

Emergency services offered

Experience The Horizon Difference. \n \nOn-Time Service. Up-Front Pricing. And The Job Done Right and Clean the First Time. GUARANTEED! \n \nHorizon Services is the region's largest and most well respected plumbing, heating and air conditioning company, with nearly 600 employees serving tens of thousands of homeowners throughout Delaware, Southeastern Pennsylvania, Southern New Jersey, and Northeastern Maryland. After a quarter of a century in business, Horizons Services remains fully committed to setting the industry standard for customer service, installation, and focusing on things that are important to busy homeowners: respect for their time, their home and their property; up-front pricing, and an unconditional 100% money back guarantee. \n

Horizon Tech under the sink
Horizon tech with homeowner
1 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for Harris Plumbing, Heating, Air & Electrical
Harris Plumbing, Heating, Air & Electrical
3.9(
54
)
Tankless Water Heater - Repair

Serving Wallingford, PA and surrounding areas

Approved

In business since 1988

Credit card accepted

Customers say: Quick response

"I had my heater serviced for the winter, and Jason did a great job. He was on time, and took his time to make sure everything was done right. He gave me so much info about the job, and what else I can do to make it work better. If you want someone to explain everything to you up front, then HARRIS Plumping and Heating should be for you. angieb"
Team
Team
Team
Truck
Truck

+8

Response time1 day
447 neighbors recently requested a quote
Recommended by26%of homeowners
Avatar for WM Henderson Plumbing & Heating
WM Henderson Plumbing & Heating
4.2(
49
)
Tankless Water Heater - Repair

Serving Wallingford, PA and surrounding areas

Approved

In business since 1989

Free estimates

Emergency services offered

"The company called and scheduled a technician to come within 3 days, which met my needs. Technician PJ came as scheduled, diagnosed the problem, went and purchased the parts and had everything repaired in just a few hours. When he left, it looked like he'd never been here - just what i wanted!"
Bringing new water heater into house
Henderson Tech looking at water heater
Recommended by80%of homeowners
Avatar for Ace Hardware Home Services
Ace Hardware Home Services
4.6(
56
)
Tankless Water Heater - Repair

Serving Wallingford, PA and surrounding areas

Approved (Corporate)

Super Service Award Winner

In business since 1966

Free estimates

Emergency services offered

"I thought the salesman mike was great. He answered every question i had and was most knowledgeable about the inner workings of oil burners. My installation team was outstanding. It was like bang bang. My oil and hot water was installed in 2 days with hot water heater installed on the first day. These guys were clean and efficient . Two thumbs up!"
OUR 20-POINT HEATING INSPECTION
Green Bow High Velocity Installation
Green Bow Installations
Green Bow Installations
Response time1 day
108 neighbors recently requested a quote
Recommended by82%of homeowners
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