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

Avatar for Atlanta Tankless and Water Heater LLC
Atlanta Tankless and Water Heater LLC
5.0(
47
)
Tankless Water Heater - Repair

Serving Riverdale, GA and surrounding areas

Approved

Super Service Award Winner

In business since 2018

Warranties offered

Credit card accepted

"Donnie is the most honest vendor I have ever worked with. He services my home, my parents, my sisters home and i have recommended him to friends. His work has always been flawless. Whether replacing our old cast iron in our home or working on the water heater - Donnie is the best. Can?t recommend them enough."
Dual Navien Tankless
Dual Navien Tankless
Canton Dual Tankless
Hotel Water Heaters
Water Heater Replacement

+7

Response time2 hrs
Response rate90%
Recommended by82%of homeowners
Avatar for Estes Services - HVAC Plumbing & Electrical
Estes Services - HVAC Plumbing & Electrical
4.5(
668
)
Tankless Water Heater - Repair

Serving Riverdale, GA and surrounding areas

Approved

In business since 1949

Free estimates

Emergency services offered

"Actually, I ended up needing a whole new water tank. So, I bought and had ESTES install the tankless water system. I couldn't have for a better team of guys to handle it. They were awesome."
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+31

Response time5 hrs
Response rate100%
20 neighbors recently requested a quote
Avatar for Cool Air Mechanical LLC
Cool Air Mechanical LLC
4.7(
279
)
Tankless Water Heater - Repair

Serving Riverdale, GA and surrounding areas

Approved (Corporate)

In business since 2011

Emergency services offered

Credit card accepted

"I cannot say enough good things about Mitchell and Demarcus. They called when they were on the way, arrived on time, and completed the installation in just a few hours. It was a tough job. The water heater was partially blocked by the furnace but Mitchell figured out how to remove the old heater without having to remove part of a wall, which is what I expected would have to happen. He re-piped the connections (the old piping was a mess!) ran the gas line extension to my stove area and placed the new heater. I had hot water within a few hours of job completion. I now look forward to hiring Mitchell again to install my new gas stove (once I buy it). I highly recommend Cool Air. I will receive a 10% discount on the water heater in the form of a gift card because I'm a Costco member."
Cool Air Mechanical Techs preparing for a day's work serving customers!
Filter Change
Cool Air Mechanical's Service Team
Loading filters in the trucks. We ensure our trucks are stocked and we have equipment and tools on hand to best serve you!
Cool Air tech headed to a job!

+35

2 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for StratCo. Services Incorporated
StratCo. Services Incorporated
5.0(
7
)
Tankless Water Heater - Repair

Serving Riverdale, GA and surrounding areas

Approved

In business since 2024

Emergency services offered

Warranties offered

"StratCo. Services was amazing. Their team was prompt, professional, and incredibly knowledgeable. They replaced my outdated water heater and left everything spotless. I highly recommend them to anyone in the Atlanta area!""
Water Heater
3 neighbors recently requested a quote
Recommended by14%of homeowners
Avatar for Casteel Heating & Cooling, LLC (West)
Casteel Heating & Cooling, LLC (West)
4.2(
307
)
Tankless Water Heater - Repair

Serving Riverdale, GA and surrounding areas

Approved

Super Service Award Winner

In business since 1987

Emergency services offered

Credit card accepted

"Last year (2021), I hired Casteel to upgrade my HVAC system, tankless water heater, update the pipes in my basement, install a pump for washing machine and bring my electricity. I have a brink home the was built in 1955 and had not had any major repairs since 1985. Everyone I spoke to during the process of consulting and repair was professional, kind and courteous. They always kept an open line of communication and were willing to adjust their schedule according to emergency circumstances that happened in my family. From the products they used to the quality of the workmanship, I am still very pleased with outcome. They respected not only my time but my property too. I will definitely hire them again. I highly recommend them to anyone in the Atlanta, GA area."
Casteel Tech Water Heater
4 neighbors recently requested a quote
Recommended by87%of homeowners
Avatar for Rooter Pro Plumbing GA
Rooter Pro Plumbing GA
4.8(
37
)
Tankless Water Heater - Repair

Serving Riverdale, GA and surrounding areas

Approved

Super Service Award Winner

In business since 2021

Free estimates

Emergency services offered

"I had a water leak in my front yard & after researching the highest rated Plumbers, I found Rooter Pro Plumbing of Georgia. They had great ratings on Trust Dale Caldwell, Angi's List, & Google. I scheduled a visit with them & Jerimey Jackson came by & did a leak detection. It was determined that I had multiple leads in my water line and he gave me all of my options & pricing. He is an expert on everything to do with plumbing & a great guy too. My water heater is 23 years old, so I decided to replace that as well. Jerimey led the work crew the next day in replacing my water line & water heater replacement. All the work was complete that day & the results are very good! I am very pleased with Rooter Pro Plumbing and the work they performed & the people I dealt with. Even the people in the office were great! I will use them again & recommend them to my friends & family! Paul Taylor"
Well Pump Installation After
Well Pump Installation Before
Well Pump Installation During
Sewer Main Repair
Sewer Main Repair During

+5

Response time4 hrs
Response rate92%
131 neighbors recently requested a quote
Avatar for ProCharged Septic&Drain cleaning
ProCharged Septic&Drain cleaning
5.0(
6
)
Tankless Water Heater - Repair

Serving Riverdale, GA and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

22 years experience in septic and plumbing. One of the best in the south guaranteed and no up charges or hidden cost. All work comes with a 2 year warranty. We can beat all companies on pricing. Veteran and Family owned and operated company. All technicians have license and certifications in the state of Georgia......

Septic
Additional Photos
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Additional Photos
Additional Photos

+13

Response time1 day
Response rate99%
3 neighbors recently requested a quote
Avatar for Lionsgate Plumbing LLC
Lionsgate Plumbing LLC
4.7(
14
)
Tankless Water Heater - Repair

Serving Riverdale, GA and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

"Punctual, professional, communicative, accomadative, knowledgeable about job, courteous, SUPER FAST. I am still pleasantly surprised. At first, I did not allow myself to exhale. I waited to see what the catch was. It's been over 10 days and everything is working great. I was even able to get an upgraded hot water heater at no additional cost! When I woke up on Christmas eve day to find my hot water heater was leaking, I did not know what to expect. After contacting the manufacturer and verifying it was under warranty, I found several companies that could do the work. I chose lionsgate and who would have thought they would be at my home the morning after Christmas and would be through in less than 2 hours! He left everything clean too. Just an all around excellent experience!"
OPTICAL OUTLET Buildout
Cali Cafe
Cali Cafe
Water Line (Boring)
Tankless Water Heater

+15

3 neighbors recently requested a quote
Recommended by42%of homeowners
Avatar for Allgood Home Services
Allgood Home Services
4.5(
4
)
Tankless Water Heater - Repair

Serving Riverdale, GA and surrounding areas

Approved (Corporate)

In business since 1947

Emergency services offered

Warranties offered

Allgood Home Services is an award-winning company that has been in business for over 10 years. All of our employees are background checked and drug tested, with technicians that are fully trained with years of experience in their trade. We offer upfront pricing in writing with options and warranties for our valued customers. We have the highest commitment to excellent customer service and want to ensure your complete 100% satisfaction. If you are not fully satisfied, let us know, and we will make it right! \n

Unclog Drain
Recommended by33%of homeowners
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