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

Avatar for Water Heaters Masters
Water Heaters Masters
4.9(
112
)
Tankless Water Heater - Repair

Serving Discovery Bay, CA and surrounding areas

Approved

In business since 2006

Free estimates

Emergency services offered

"Water Heater Masters were top-notch! I called on a Saturday afternoon - they were available 9am Sunday morning to come and inspect and quote. They only had one guy working that day, but scheduled me for Monday morning between 8 and 9. At 8:15am I got a call with an ETA of 8:45, which was a really nice touch! Despite telling me it would take an entire day to install, they were done by 1pm. They also found some creative ways to do the install to avoid drilling through my stucco (for the exhaust vent and for the condensate run-off). Very professional and clean-looking install. These guys may not always be the cheapest around, and they recommended a top-of-the-line heater (which is what I really wanted anyway), but I'd much rather pay a little extra for that level of service and support. Thank you!"
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+20

Response time9 hrs
Recommended by94%of homeowners
Avatar for Mitko BG Plumbing Inc
Mitko BG Plumbing Inc
5.0(
38
)
Tankless Water Heater - Repair

Serving Discovery Bay, CA and surrounding areas

Approved

In business since 2024

Free estimates

Emergency services offered

"I had a great experience with Mitko professional service for our water heater burner problem, I called a day before, and Mitko came to our house next day, he did full analysis & testing of the water heater and right after he did find out the problem and had all required parts in his company van, took him to replace and fixed within couple of hours. Excellent service with reasonable service fee!"
Tankless Installation
Tankless repairs
Tankless repairs
Tankless repairs
Tankless repairs

+12

52 neighbors recently requested a quote
Avatar for All Water Heaters & Plumbing LLC
All Water Heaters & Plumbing LLC
4.4(
204
)
Tankless Water Heater - Repair

Serving Discovery Bay, CA and surrounding areas

Approved

Super Service Award Winner

In business since 1997

Free estimates

Emergency services offered

"Jaymie first visited to review our need for correcting a pre-existing faulty installation of a tankless water heater. He grasped our concerns at once, joined us in brainstorming a relatively simple solution, and produced a financially reasonable bid on the spot. We accepted it as far more reasonable than other bids. He arranged to have the work performed by his company within a few days. At the appointed time, Jaymie himself arrived to do the job, which pleased us greatly since he already knew exactly what needed to be done, making it unnecessary to brief a new workman. He is a very competent, friendly, and helpful person. We would not hesitate to call on him for any future plumbing needs."
Noritz Tankless
Noritz Tankless
Noritz Tankless
Rinnai Tankless
Rinnai Tankless

+20

Response time7 hrs
Response rate87%
165 neighbors recently requested a quote
Avatar for Albert Nahman Plumbing, Heating, and Cooling
Albert Nahman Plumbing, Heating, and Cooling
4.4(
722
)
Tankless Water Heater - Repair

Serving Discovery Bay, CA and surrounding areas

Approved (Corporate)

In business since 1981

Free estimates

Warranties offered

"Guy who came gave me good advice and advised that he felt my issue was not needed for repair. He didn't try to sale me any service as he saw no need. I appreciate a plumber who isn't trying to get work out of people whom don't need it."
Living room Mini-Split
Aquasana home Filtration
Almost no disturbance at EBMUD meter
Navien with filtration to protect the heat exchanger
New house valve and Pressure Reducing Valve

+73

Response time8 hrs
Response rate100%
44 neighbors recently requested a quote
Avatar for H K & S Plumbing Co.
H K & S Plumbing Co.
4.3(
96
)
Tankless Water Heater - Repair

Serving Discovery Bay, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2000

Free estimates

Emergency services offered

"I highly recommend this company!!! He responded within minutes of my searching for a plumber. He came the next day and installed a new tankless water heater. He also found a faulty electrical outlet and repaired it as well. Quality workmanship. I will keep his number. His name was Harry."
H K & S Plumbing Co.
Response time11 hrs
28 neighbors recently requested a quote
Recommended by73%of homeowners
Avatar for Valice Plumbing
Valice Plumbing
5.0(
10
)
Tankless Water Heater - Repair

Serving Discovery Bay, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2007

Emergency services offered

Warranties offered

When looking for a reliable plumber in Stockton, CA, look no further than Valice Plumbing. We are a local family-owned business serving clients in Stockton, Lodi, and surrounding cities since 2007. Our contractor personally handles every job to ensure top-quality service. Trust your plumbing needs to an experienced professional. We guarantee our work and are fully licensed for your peace of mind. Whether you need plumbing services, drain cleaning, water heater installation, new construction/repiping, sewer inspections, or any other residential or commercial plumbing service, we've got you covered. Enjoy senior discounts, free estimates, and first-time customer discounts. Contact us today!

Response time7 hrs
Response rate87%
Avatar for Mike Williams Plumbing
Mike Williams Plumbing
4.3(
50
)
Tankless Water Heater - Repair

Serving Discovery Bay, CA and surrounding areas

In business since 1970

Free estimates

Emergency services offered

"Mike showed up asap, scoped the job requirements, gave a written estimate that was accepted by insurance company, had team out next morning to roll up rug in bedroom, break through concrete floor, locate actual leak (~6" laterally from where professional had estimated it to be) and about 18" beneath floor surface, repaired pipe, pressurized system to check it, however repaired pipe leaked (crimping a fitting onto corroded pipe didn't work), then properly cleaned, sweated new piece of pipe into place, repressurized system, inspected new work to verify success, filled hole with sand, covered and leveled that with freshly mixed concrete. All was completed in 1 day. Kudos. Thanks, Mike! Your timely response was greatly appreciated! Mike's bid was higher than that of the leak detection company; however, Mike's company was far more responsive to our need for hot water and was there the next day. The lower bid came from a company that wanted us to wait 21 days(!) for them to repair it. Since we had an understanding insurance company, they were willing to pay the higher cost for our comfort and convenience. That's right! You read it correctly. An insurance company that looked beyond their bottom line to put our needs first."
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Recommended by90%of homeowners
Avatar for HVAC Utor Services
HVAC Utor Services
5.0(
31
)
Tankless Water Heater - Repair

Serving Discovery Bay, CA and surrounding areas

In business since 2010

Free estimates

Emergency services offered

"Diego was very efficient and professional. We bought a new water heater from Home Depot, and he let us know everything we needed beforehand so that his work was really quick. He demolished our old water heater stand so that we can have it replaced with a new one also. Thanks, Diego!"
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+24

Recommended by100%of homeowners
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