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Top-Rated Water heater installers and replacers in Discovery Bay - Updated Nov 2026

Avatar for Water Heaters Masters
Water Heaters Masters
4.9(
112
)
Water Heater - Install or Replace

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!"
Additional Photos
Additional Photos
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Additional Photos

+20

Response time9 hrs
Recommended by94%of homeowners
Stillman Plumbing Company
4.9(
42
)
Water Heater - Install or Replace

Serving Discovery Bay, CA and surrounding areas

Approved

In business since 1985

Free estimates

Credit card accepted

At Stillman Plumbing Company, we are a very well established business providing over 27 years of unmatched expertise. Customer preference and priorities are always first. We are very timely with our work and never lose attention to detail. Call us now for a free quote.

Tankless
Tankless
2 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for Premier Plumbing Solutions 925
Premier Plumbing Solutions 925
5.0(
51
)
Water Heater - Install or Replace

Serving Discovery Bay, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Warranties offered

"The proprieter, Mr. Hernandez, helped me select a new tankless water heater to replace my old one. He was generally easy to communicate with and did what he said he was going to do. Although this was a replacement water heater, the plumbing had to be replaced to fit the new unit. A few hours after he installed the new water heater, I noticed a minor problem, texted Mr. Hrnandez, and he was at my house an hour later, at 9:00 pm, to fix it. I have had many craftsmen work on my house over the years. It's usually pretty frustrating and aggravating. When there was a problem after other jobs, most of them told me my house was defective, admitted that the problem was their fault but refused to fix it, claimed that I did not understand the situation, or just stopped responding to my communications. Mr., Hernandez responded instantly to my text message and was at my house an hour later (at 9:00 pm) to fix the problem. He is a skilled professional plumber and an honorable person. I hope to do some significant remodeling that will require rebuilding some of my house's plumbing, and I'll try to get Mr. Hernandez to come back for the work."
Response time5 hrs
1 neighbors recently requested a quote
Recommended by47%of homeowners
Avatar for Cali Water Heater & HVAC
Cali Water Heater & HVAC
4.8(
33
)
Water Heater - Install or Replace

Serving Discovery Bay, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2023

Free estimates

Small jobs welcome

"Carl was extremely professional and went above and beyond in helping me replace my old water heater. He installed a top-rated water heater at a very competitive price. Great experience all around!"
Response time6 hrs
Response rate94%
56 neighbors recently requested a quote
Avatar for Albert Nahman Plumbing, Heating, and Cooling
Albert Nahman Plumbing, Heating, and Cooling
4.4(
722
)
Water Heater - Install or Replace

Serving Discovery Bay, CA and surrounding areas

Approved (Corporate)

In business since 1981

Free estimates

Warranties offered

"The cost to replace three natural gas wall heater was slightly less than Gree mini-splits heater cooler. The installers were courteous and professional. Delayed several days as the equipment haven’t arrived yet. Job cost as agreed, but took half day longer due to the complexity of installation. Results are excellent. The mini-split units works as specified. Will use Albert Nahman heating plumbing again in the future."
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
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