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Top-Rated Tankless water heater installers in San Francisco - Updated Nov 2026

Avatar for Albert Nahman Plumbing, Heating, and Cooling
Albert Nahman Plumbing, Heating, and Cooling
4.4(
722
)
Tankless Water Heater - Install

Serving San Francisco, CA and surrounding areas

Approved (Corporate)

In business since 1981

Free estimates

Warranties offered

"The first visit lead to cleaning the area around the heater and burners and checking the thermocouple. Sadly that seemed to make it worse. Less than a week later No hot water for over 30 hours till the second technician replaced the thermocouple. All is perfect now. No charge for the second visit. The next step, if needed will be a tankless and their quote looks a bit steep. But I am really hoping I won’t need to go that far."
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 Facilities Plumbing & Drain
Facilities Plumbing & Drain
4.8(
52
)
Tankless Water Heater - Install

Serving San Francisco, CA and surrounding areas

Approved

In business since 2014

Free estimates

Emergency services offered

"Robert was an amazing plumber to work with. Extremely professional, knowledgeable, responsive and honest. All traits that are hard to come by in this profession. Ever since I found his business, Iâ ve never even bothered to look elsewhere. He never tries to upsell you, gives you options and always cleans up meticulously. Iâ ve recommended him to all my friends and family and they were all happy with his services. So far heâ s fixed my clogged sink, installed and repaired my garbage disposal, came immediately when my storm drain busted, and gave me quotes and advice on a tankless water heater. Hopefully I wonâ t need his services any time soon though!"
Starbucks 100-Gal Waterheater
Sediments inside supply line
3M 100,000-Gal
dual 3m filter install
3M 100,000-Gal

+44

Response time6 hrs
Response rate100%
71 neighbors recently requested a quote
Avatar for FDL PLUMBING INC
FDL PLUMBING INC
5.0(
84
)
Tankless Water Heater - Install

Serving San Francisco, CA and surrounding areas

Approved

Super Service Award Winner

Free estimates

Warranties offered

Customers say: True professional

"Francisco did a fantastic job flushing my tankless water heater. Right from the start, he provided a very fair, transparent quote with zero surprise fees. Before starting, he took the time to explain the entire process and walked me through each step as he worked. He seemed knowledgeable, easy to talk to, and importantly ran a completely hassle-free operation. I felt confident throughout the entire service that I was getting top-tier work at an honest price. Highly recommend Francisco for any plumbing needs!"
Neutralizer
cleared orifice.
New Home in Morga CA
Kitchen sink Faucet Replacement
Bathroom/Sink repair

+20

1 neighbors recently requested a quote
Recommended by47%of homeowners
Avatar for FDL Plumbing, Inc.
FDL Plumbing, Inc.
5.0(
41
)
Tankless Water Heater - Install

Serving San Francisco, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2021

Credit card accepted

Customers say: True professional

"Got a note from SFPUC for massive water use for the past several days, but no clear smoking gun. Was really worried and called Francisco asking for immediate help. He was at my house in 15 minutes and walked through all the most common culprits (toilets, etc), until we heard the water running outside and found that my kids had left the hose running. Paid him for his time and will definitely be calling him the future - amazing service. Kids learned a good lesson too."
Existing PRV
New 3/4 Pressure reducing Valve
Existing
New Kitchen Sink/Faucet/Disposal
New Home in Moraga CA

+10

Response time2 hrs
Response rate94%
Recommended by67%of homeowners
Avatar for Kenneth Asire Plumbing
Kenneth Asire Plumbing
4.8(
272
)
Tankless Water Heater - Install

Serving San Francisco, CA and surrounding areas

Approved

In business since 2017

Free estimates

Credit card accepted

"Needed to replace water heater urgently. I called Kenneth Asire around 5pm. He stopped by that same evening and by 9am the next day I had a new water heater installed. Very professional. I definitely recommend him!!"
Response time1 day
Recommended by97%of homeowners
Avatar for CLEVER PLUMBING & ROOTER INC
CLEVER PLUMBING & ROOTER INC
4.9(
37
)
Tankless Water Heater - Install

Serving San Francisco, CA and surrounding areas

Approved

Free estimates

Credit card accepted

Offers commercial services

"Angel and Clever Plumbing team are the best! They replaced water heaters, repaired leaks, clogged drains and various other plumbing jobs. I highly recommend Clever Plumbing for any plumbing issues! He has helped me with multiple plumbing jobs, both big and small, and has always been great to work with. He’s very responsive, quick to schedule, and does a great job figuring out practical solutions. He’s reliable, knowledgeable, and someone I know I can count on when something comes up. I wouldn’t hesitate to call him again or recommend him to others, you will not regret it!"
Plumbing
Faucet replacement
Faucet replacement
Faucet replacement
Faucet replacement

+10

5 neighbors recently requested a quote
Recommended by81%of homeowners
Avatar for DRAIN RIGHT PLUMBING & ROOTER INC
DRAIN RIGHT PLUMBING & ROOTER INC
5.0(
24
)
Tankless Water Heater - Install

Serving San Francisco, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2025

Free estimates

Emergency services offered

"My water heater was leaking and I needed it fixed asap because we had no hot water and I have small kids at home. Robert came, he saw the problem and fixed it fast and efficiently. He was professional and polite and the price was right. I will definitely call him again in the future. And have recommended him to family and friends. Thank you Drain Right Plumbing!!"
Before
After
Water heater
Descaling tankless water heater
Toilet replacements

+34

Response time3 hrs
Response rate95%
6 neighbors recently requested a quote
...
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