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

Avatar for Ehrhardt Brothers Quality Plumbing, Inc
Ehrhardt Brothers Quality Plumbing, Inc
4.8(
432
)
Tankless Water Heater - Repair

Serving Ellicott City, MD and surrounding areas

Approved

In business since 1992

Warranties offered

Small jobs welcome

"Saved by Ehrhardt Brothers Quality Plumbing (a.k.a ColumbiaPlumber)! (West of Baltimore) Our gas water-heater failed! It’s 30° outside! (Mar 2026). It was leaking, so we shut off the gas, the pilot, and the water inlet, to lessen damage if it burst. Ehrhardt offered a price based on our descriptions and photos, of course with caveats for anything unexpected. A water-heater costs a pretty-penny, but less than we expected. A fair price. They came the next morning, and had the water heater replaced in 90min. Impressive. But the manufacturer sent a unit with a bad pilot! Ehrhardt returned immediately and in 30min, they figured it out. They had a replacement part over-nighted. The next morning, in 30min, done. Hot water. AAAAAHHH :-) The problem was the manufacturer’s fault, and Ehrhardt handled it flawlessly: Excellent communication by Ehrhardt, priority attention to our problem, no excuses, just fast resolution. Great service staff. Perfect!"
Water Heater
Water Heater
Water Heater
Water Heater
Additional Photos

+40

Recommended by96%of homeowners
Avatar for DAY & NIGHT PLUMBER LLC
DAY & NIGHT PLUMBER LLC
4.8(
93
)
Tankless Water Heater - Repair

Serving Ellicott City, MD and surrounding areas

Approved

In business since 2020

Free estimates

Emergency services offered

"Marin the tech was great he was friendly and took his time to explain what happen with my water heater and how I could prevent the problem from happening again. I would differently ask for him again to service my water heater. Thank you Marin!!!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+1

Response time11 hrs
5 neighbors recently requested a quote
Recommended by97%of homeowners
Avatar for Mahon Plumbing
Mahon Plumbing
4.6(
199
)
Tankless Water Heater - Repair

Serving Ellicott City, MD and surrounding areas

Approved

In business since 1994

Emergency services offered

Warranties offered

"This company is nothing other than excellent. A bit pricey, but you only get what you play for - and I got plenty. On Saturday afternoon, I found out that I needed a complete sewer line replacement. By late Sunday afternoon, I had one! The crew had to dig down about 10 feet to remove the broken line and then had to tunnel under my patio to get to the cast iron pipe in order to connect the new line. After the installation, the dirt was replaced, the area was seeded and covered with straw, and the sidewalks and parking lot were sprayed clean. Every single guy in the crew was friendly and knowledgeable. Special thanks to Gregg, Chris and Mike. I have recommended Mahon to friends and family and have already scheduled another job. If you need a good plumber, whether for something major or minor, I highly recommend Mahon Plumbing."
Tankless water heater installation
Tankless Water Heater Installation
Commercial drain cleaning
Sewer Line Video Inspection
Water heater replacement

+30

Response time7 hrs
Response rate100%
Recommended by92%of homeowners
Avatar for Pohlman Plumbing Inc
Pohlman Plumbing Inc
4.4(
42
)
Tankless Water Heater - Repair

Serving Ellicott City, MD and surrounding areas

Approved

In business since 2008

Free estimates

Emergency services offered

"Originally we thought we would need to cut through our driveway to get to the faulty water line. The team Pohlman sent out did an day of survey and were able to get to the pipe from the strip of yard next to the driveway. Saved more then a half-day of work and the majority of the initial quote."
Finished Shower
Finished Shower
Panoramic View
Vanity
Mid-replacement

+10

Response time8 hrs
Response rate97%
Recommended by86%of homeowners
Avatar for Horizon Services, LLC (MD)
Horizon Services, LLC (MD)
3.8(
1,468
)
Tankless Water Heater - Repair

Serving Ellicott City, MD and surrounding areas

Approved

In business since 1989

Free estimates

Emergency services offered

"Hello, I am requesting assistance from a licensed plumber/gas fitter for gas service restoration at my property: 1239 Maple Ave. Baltimore, MD 21227 BGE has determined that the prior gas service was abandoned and is now processing the project as a new gas service line and exterior meter installation. BGE will be meeting me on-site on Tuesday, June 9, 2026, at 9:00 AM to review and approve the proposed exterior meter location. I need a licensed plumber/gas fitter who can either attend that BGE site visit or come immediately afterward to evaluate the work required on the customer side of the gas system. The scope of work includes: - Inspecting the existing gas piping to determine whether any portion can be safely reused; - Extending, repairing, or replacing internal gas piping as needed; - Establishing the new customer-side gas connection point for the exterior BGE meter; - Pulling the required gas/plumbing permit; - Performing the required pressure test; - Coordinating the requir"
Horizon Plumber under sink
Horizon Plumber in Kitchen with homeowner
Horizon Plumber crawl space
Recommended by89%of homeowners
Avatar for A&C Plumbing and Heating
A&C Plumbing and Heating
5.0(
8
)
Tankless Water Heater - Repair

Serving Ellicott City, MD and surrounding areas

Approved

In business since 2019

Free estimates

Emergency services offered

"Wouldn't hire anyone else! Did all the plumbing work on my new "dated" home and made me feel confident about everything. This has been the easiest part of fixing up my new house! Can't say enough!"
Response time3 hrs
Recommended by100%of homeowners
Avatar for Prime Plumbing, LLC
Prime Plumbing, LLC
4.4(
42
)
Tankless Water Heater - Repair

Serving Ellicott City, MD and surrounding areas

Approved

Super Service Award Winner

In business since 2012

Small jobs welcome

Credit card accepted

"Prime Plumbing provided excellent customers service from the beginning to the end. Rob was very thorough when he came out to provide estimate, financing options and gave good explanation of what was needed to replace my direct vent hot water tank for my condo. Rob was also the one who installed the hot water tank and did an excellent job. Direct vent hot water tanks are much more expensive than your standard hot water tank, so it was pricey. I initially found Prime Plumbing on Angie's list and I would recommend them for your plumbing needs. I'm a single female in my early 60's. I did end up using my own financing because their finance company interest rates were way too high for someone with excellent credit. Do rate comparison first."
Septic Pumping
Hydrant Removal
Failed Hydrant
Response time3 hrs
227 neighbors recently requested a quote
Recommended by21%of homeowners
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