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Top-Rated Tankless water heater installers in Fairfield - Updated Nov 2026

Avatar for Water Heaters Masters
Water Heaters Masters
4.9(
110
)
Tankless Water Heater - Install

Serving Fairfield, CA and surrounding areas

Approved

In business since 2006

Free estimates

Emergency services offered

"I have what turned out to be a 30 year old water heater replaced by this great company and they did it the same day of the quote. The installer had the water heater I wanted on the truck and did an excellent job of putting in the new unit, cleaning up and even replacing copper flex tubing and installing a new overflow pipe out of copper as well, no additional cost. This company specializes in water heaters and couldn't do any additional work on supply lines and they clearly state that on their website. I didn't need that type of additional work."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+20

Response time9 hrs
Recommended by95%of homeowners
Avatar for All Water Heaters & Plumbing LLC
All Water Heaters & Plumbing LLC
4.4(
203
)
Tankless Water Heater - Install

Serving Fairfield, CA and surrounding areas

Approved

Super Service Award Winner

In business since 1997

Free estimates

Emergency services offered

"They showed up on time. They replaced and installed a new tankless water heater unit. David and his staff are very friendly. We are happy of our newly installed unit. It turned out great!"
Noritz Tankless
Noritz Tankless
Noritz Tankless
Rinnai Tankless
Rinnai Tankless

+20

Response time7 hrs
Response rate87%
140 neighbors recently requested a quote
Avatar for Cali Water Heater & HVAC
Cali Water Heater & HVAC
4.8(
31
)
Tankless Water Heater - Install

Serving Fairfield, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2023

Free estimates

Small jobs welcome

"I got home from work and discovered that my water heater had a major leak that required shutting off the water to the house. Carl at Cali Water Heater responded immediately and less than 24 hours later I had a new water heater installed, water restored, and all at a fair price. Highly recommend!"
Response time6 hrs
Response rate94%
49 neighbors recently requested a quote
Avatar for True Blue Plumbing Co.
True Blue Plumbing Co.
4.6(
77
)
Tankless Water Heater - Install

Serving Fairfield, CA and surrounding areas

Approved

Super Service Award Winner

In business since 1992

Free estimates

Credit card accepted

"Marcell and True Blue Plumbing were a pleasure to work with. He was friendly and took pride in his work and client satisfaction. Marcell installed a gas line for me in Napa within the same week of providing the estimate, and he even helped me flush out my water heater free of charge. I will definitely use him for any future plumbing needs. My profession is a property manager and itâ s hard to find quality vendors like True Blueâ ¦Thanks again."
Response time7 hrs
25 neighbors recently requested a quote
Recommended by91%of homeowners
Avatar for Hill's General Plumbing Services
Hill's General Plumbing Services
4.8(
21
)
Tankless Water Heater - Install

Serving Fairfield, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2015

Free estimates

Emergency services offered

"Excellent from start to finish. Arrived on time, replaced our old water heater with a new one, left everything very clean and, from what I can tell, provided excellent workmanship at a very reasonable price."
Hill's General Plumbing Services
Hill's General Plumbing Services
Hill's General Plumbing Services
Hill's General Plumbing Services
Hill's General Plumbing Services

+5

Response time4 hrs
Response rate85%
5 neighbors recently requested a quote
Avatar for Beutler Air Conditioning & Plumbing
Beutler Air Conditioning & Plumbing
3.8(
131
)
Tankless Water Heater - Install

Serving Fairfield, CA and surrounding areas

Approved (Corporate)

In business since 1956

Free estimates

Warranties offered

"The day the service was scheduled did not go well. We were scheduled between 8 and 12, but they called in the morning to move it back to 10 to 2. I called them after 2 because we had not heard anything. The technician finally came around 3:45. I think it is very poor customer service to expect someone to wait all day for a service call. Once the technician arrived the service was done very professionally. He did find that they should have enlarged our vent with the install two years ago, and they will have to come back and do that. It makes me think they did not have proper attention to detail during the install. There also was an up-sale so that a $79 service call ended up costing us over $450."
Drain Cleaning
22 neighbors recently requested a quote
Recommended by77%of homeowners
Avatar for Bell Brothers Electrical, Plumbing, Heating, & Air
Bell Brothers Electrical, Plumbing, Heating, & Air
4.2(
116
)
Tankless Water Heater - Install

Serving Fairfield, CA and surrounding areas

Approved

In business since 1996

Free estimates

Emergency services offered

"Furnace blower would't run. James explained the problem & installed the condenser-which he had on the truck. He also explained some "issues" that might come up in the near future. He performed some maintenance that was overdue. Seemed very thorough & most importantly, the heater worked properly when he was done!"
HVAC System Check Up
HVAC Install
Furnace Repair
Furnace Tune-Up
Heating Maintenance

+3

Response time6 hrs
Response rate86%
Recommended by91%of homeowners
Avatar for Oak Plumbing Inc
Oak Plumbing Inc
4.6(
101
)
Tankless Water Heater - Install

Serving Fairfield, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2016

Free estimates

Emergency services offered

"Jared showed up and wasted no time in doing two things at once (draining the hot water heater and repairing a small fireplace gas leak). He educated me a little on what he was doing which is always helpful. He was also careful to keep his booties on, so as not to ruin the shiny wood floors. Highly recommend based on this experience."
Response time2 days
5 neighbors recently requested a quote
Recommended by85%of homeowners
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