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

Avatar for Orbit Water Solutions
Orbit Water Solutions
4.8(
44
)
Tankless Water Heater - Repair

Serving Knoxville, MD and surrounding areas

Free estimates

Emergency services offered

Credit card accepted

"We purchased a house and adding a whole house water filter was on our list. Our local Orbit dealer performed a free water test and confirmed a that a lot of the junk we had read was in our city water was in fact there. Our previous house also had hard water and we saw firsthand what it did to our pipes and hot water tank. Plus we were tired of a filtered water pitcher taking up space in our refrigerator. Our sales person went over all of the features of the Puronics 7000 system and outlined the maintenance which simple and easy to understand. Installation took place about two weeks later and the guys were done in a day. About a year out and we're still very happy with the improved water quality and the system itself works great."
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+9

Recommended by97%of homeowners
Avatar for Tankless Solutions
Tankless Solutions
5.0(
4
)
Tankless Water Heater - Repair

Serving Knoxville, MD and surrounding areas

In business since 2013

Free estimates

Emergency services offered

"When I bought my combo tankless boiler/hot water heater, the original installers messed up installation, then couldn't figure out how to fix it. Thank god I found Rod. He fixed their mess, installed a sediment filter that's been super effective, and recently helped fix a venting issue caused during a remodel. He knows his stuff inside out, is fast and efficient, and a real pleasure to work with. Would absolutely recommend him for anyone with on-demand water systems."
Response time1 day
Recommended by100%of homeowners
Avatar for TriState Home Services
TriState Home Services
4.6(
204
)
Tankless Water Heater - Repair

Serving Knoxville, MD and surrounding areas

In business since 1949

Free estimates

Emergency services offered

"The contractor did a quick but thorough job repairing each electrical outlet and provided advice on how to maintain them properly. The ring doorbell installation was quick and neat. The contractor wore a face mask at all times and we had a completely contact-less visit (including the bill payment - we were able to "sign" via our own devices). This company was a pleasure to work with."
Furnace Tune Up
Floor Heating System
Additional Photos
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+2

Response time1 day
Recommended by91%of homeowners
Avatar for National Water Service Corp
National Water Service Corp
4.6(
114
)
Tankless Water Heater - Repair

Serving Knoxville, MD and surrounding areas

In business since 1979

Free estimates

Emergency services offered

"I thought the quality work was very good. They were on time. They diagnosed the problem quickly. I just love that they gave a nice service. I haven't experienced any problem. They go out of their way to get the parts needed for repairs."
Water Treatment, water softener, solution feeder, constant pressure well pump system
Tankless Water Heater
Whole House Water Treatment with Twin PFA/PFOAs remediation filters
Installing a new well line from the well to the house
Tankless Water Heater and Traditional Water Heater

+31

Recommended by92%of homeowners
Art's Plumbing, Inc.
4.9(
55
)
Tankless Water Heater - Repair

Serving Knoxville, MD and surrounding areas

In business since 1991

Free estimates

Credit card accepted

"Our plumbing system was 33 years old. Arts Plumbing completely replaced the entire water system, plumbing, water heater, water tank, some bathroom fixtures, and installed a water filtration system. We had outside hose lines installed. The crew was experienced, professional, efficient and friendly. Everything was organized, labeled well and they went over the system with us. They offered a few suggestions that really helped the efficiency of the system. It was a pleasure having them do the work, great people! We were pleased with the price and we will continue to use them for all our plumbing needs."
Amazing new tub
Basement Bath Remodel
Gas Water Heater Installed
New pressure tank and water filtration system
Response time1 day
Recommended by97%of homeowners
CHEROKEE PLUMBING INC
5.0(
27
)
Tankless Water Heater - Repair

Serving Knoxville, MD and surrounding areas

In business since 1992

Free estimates

"I rarely give out such high ratings however Greg at Cherokee plumbing exceeded expectations. This was the second time in one week we needed plumbing services - since bad luck usually comes in threes we know who to call if it's a plumbing problem! Our hot water heater broke over the weekend and Greg came to our rescue on a Tuesday. He was already in the middle of another big job however made the time to come to our rescue. He arrived promptly, did the job quickly, cleaned up the work area, and the cost of the job ended up less than expected!"
Recommended by100%of homeowners
Avatar for Angel Services Group
Angel Services Group
4.4(
919
)
Tankless Water Heater - Repair

Serving Knoxville, MD and surrounding areas

In business since 1999

Free estimates

Emergency services offered

"Technically the service went very good. Although they were being resistant about getting a permit which is required through my county, they did do it but later sent me a bill through the mail. This also included the price of a drip pan which I thought went hand in hand with the water heater. I was not aware I would have to pay these additional fees."
finished kitchen.
Mr. Espana
Mr. Lopez
Pam Anderson
Mehran Etedali

+84

Recommended by82%of homeowners
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