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Top-Rated Tankless water heater repair pros in San Gabriel - Updated Nov 2026

Avatar for Payless Water Heaters & Plumbing
Payless Water Heaters & Plumbing
4.2(
132
)
Tankless Water Heater - Repair

Serving San Gabriel, CA and surrounding areas

Approved

In business since 2004

Free estimates

Emergency services offered

"Perfectly. They cleaned everything up, explained how the system worked and how often it needs attention, and hauled away the old hot water heater. They arrived on time, worked steadily, and finished before dinner time."
New Tankless Water Heater Installation
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+19

Response time8 hrs
Response rate100%
Recommended by73%of homeowners
Avatar for Western Rooter & Plumbing
Western Rooter & Plumbing
4.8(
172
)
Tankless Water Heater - Repair

Serving San Gabriel, CA and surrounding areas

Approved

In business since 1981

Free estimates

Emergency services offered

"Western Rooter to the rescue again! I had a small underground leak which appeared to be due to a bad sprinkler valve. A sprinkler repair company determined that it was not a bad sprinkler valve and thought it was due to a leak in the main water line. Daniel and Alex dug down to find that the leak was coming from a very old (at least 36 years) broken pvc line. After much testing and head scratching to try to figure out where the water was coming from, they decided to "chase the pipe." After much digging, they found that the very old broken pvc pipe was hooked up to a sprinkler valve that was buried 18 inches underground that had not been capped--only turned off. Roots from a nearby tree had opened the valve which caused the leak--crazy! The current sprinkler system has been the same one since we moved into the house in 1988. It took 36 years for the underground leak to occur!"
Ruben installs a new drainage system under a customers home. Working in a crawl space is rough, but we do what is needed.
Backing up? Got roots? Blast those roots out with a Hydro Jetter! We use a wart hog nozzle that combines controlled rotation with a unique 8 jet cutting configuration optimized for removing roots. It’s better with a jetter! Call us! We got this! ??
Sewer Line Camera
No drain clog too big or small, Western Rooter covers them all!
Justin clearing a Kitchen sink back-up after the Memorial holiday.
HALO 5 whole house water filtration system.

+542

Response time12 hrs
Response rate100%
5 neighbors recently requested a quote
Avatar for G M C Plumbing, Inc.
G M C Plumbing, Inc.
4.9(
86
)
Tankless Water Heater - Repair

Serving San Gabriel, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2019

Free estimates

Emergency services offered

"Very professional. Prompt. Tankless water heater has been working fine ever since. Hired another plumbing company before calling G M C. They were half the price. But did not solve the problem. David with G M C diagnosed the problem. Completed the work. No problems ever since. Thank you Angi, thank you David and G M C Plumbing."
New Drainage
Old  shower Drainage
New kitchen faucet
New Drainage
New Drainage- SEWER LINE

+3

Response time5 hrs
Response rate97%
24 neighbors recently requested a quote
Avatar for Alpine Plumbing, Heating, and Air
Alpine Plumbing, Heating, and Air
4.7(
36
)
Tankless Water Heater - Repair

Serving San Gabriel, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2014

Free estimates

Emergency services offered

"Mike was great! He was friendly and knowledgeable. He let me know all the options for replacing my water heater and did the work quickly and neatly. Will definitely be calling him again!"
Plumbing - Drain Cleaning Project
Sewer cleaned of roots and ready for lining
Prepping pipe for lining by removing massive roots
Mixing resin for liners, this resin gardens to create a solid pipe
Sewer robot in the pipe

+26

Response time9 hrs
9 neighbors recently requested a quote
Recommended by67%of homeowners
Avatar for HARMONY ELECTRIC PLUMBING & AIR INC
HARMONY ELECTRIC PLUMBING & AIR INC
4.8(
36
)
Tankless Water Heater - Repair

Serving San Gabriel, CA and surrounding areas

Approved

In business since 2015

Free estimates

Emergency services offered

"They called us quickly and got a plumber out within a few days. Super thorough - tested all pipes and water sources to diagnose the problem. They were able to perform maintenance on most bathrooms the same day and improve the water temperature in our showers. Gave helpful, non-biased advice on potential further plumbing improvements. We will likely call this company again for any and all future plumbing needs."
784 neighbors recently requested a quote
Recommended by38%of homeowners
Avatar for AD3 PLUMBING
AD3 PLUMBING
4.9(
17
)
Tankless Water Heater - Repair

Serving San Gabriel, CA and surrounding areas

Approved

In business since 2022

Free estimates

Offers commercial services

"Adrian and his crews are very punctual, polite, and also very professional. They were able to accommodate my schedule and specific requests for the removal/installation of my water heater. I will definitely recommend Adrian’s services to my friends."
Water Heater Install
Water Heater Install
Replace Toilet Flange
Replace Toilet Flange
Replace Toilet Flange

+6

Response time1 day
Response rate100%
2 neighbors recently requested a quote
Avatar for Adeedo!
Adeedo!
2.8(
2
)
Tankless Water Heater - Repair

Serving San Gabriel, CA and surrounding areas

Approved

In business since 1949

Free estimates

Emergency services offered

100% Happiness Guarantee – Adeedo is Los Angeles’ trusted plumbing and HVAC expert, delivering fast, reliable service with expert care. We offer Same Day Service—days, nights, weekends, and holidays.\n\nSince 1949, we’ve provided premier HVAC and plumbing services throughout Los Angeles, earning a reputation for quality workmanship and dependable results. Our skilled plumbers handle everything from faucets, fixtures, and water heaters to copper piping, re-piping, trenchless sewer repair, sewer lining, and routine maintenance.\n\nOur HVAC specialists provide furnace and AC maintenance, repair, and installation, including energy-efficient upgrades, mini-splits, programmable thermostats, and complete system replacements.\n\nFrom your first call to job completion, Adeedo delivers the professionalism and expertise homeowners expect.

Drain Clearing
AC Tune-Up
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