Water Heaters Only
Company Overview
Since 1968, our sole focus has been perfecting water heater service. We handle repairs, installations, and replacements for every system type. Our licensed technicians arrive fully stocked with specialized parts.
While others juggle drains and pipes, we perfect water heaters. Emergency calls answered day or night at standard rates. Over 500,000 systems serviced since our founding.
Your satisfaction is backed by our price-beat promise. Every installation includes robust product guarantees.
Ruptured tanks get priority emergency service. From residential to restaurant units, we've seen it all.
Decades of excellence prove our commitment. Call now for no-pressure expert advice.
**Specializing in:**
Precision tankless system setups in Concord
Gas water heater repairs that last
Apartment complex water heating solutions
Leaking tank crisis resolution
Our founder revolutionized the industry in '68. The specialty trucks still roll 24/7. Your hot water deserves nothing less.
Business Services
- Hot water recirculation pump installation
- Hot water recirculation pump repair
- Plumbing inspection
- Plumbing installation or replacement
- Plumbing repair
- Water heater installation
- Water heater repair
Business Location & Hours
Mon: | Open 24 hours |
Tue: | Open 24 hours |
Wed: | Open 24 hours |
Thu: | Open 24 hours |
Fri: | Open 24 hours |
Sat: | Open 24 hours |
Sun: | Open 24 hours |
Recommended Customer Reviews

I just got a new water heater installed in record time a couple of weeks ago. I got in touch with them through the ""projects"" section on Yelp on a Saturday and my tech Luis came out the next day on a Sunday! I was so grateful. He was very kind, and quite funny too! Don't let the lack of reviews fool you. They have loads through Google, but I wanted to leave one here too so they don't get overlooked. Thanks for saving the day!

James Bustillo - Castro Valley resident
Water Heaters Only's John Fantham did a wonderful job with our very old water heater replacement (32yr old gas water heater). Two days after Christmas and no hot water for guests to shower! WHO's John came promptly, in the time slot we were told, and did a very professional job with the installation -- taking much care not to unnecessarily disturb the old pipes to which he needed to make connections.
John explained the job in detail to us before starting and pointed out important points as the job progressed. His estimate was within $100 of the telephonic estimate we received the day before when we scheduled the appointment. No surprises, no extras, no haggling. Just getting the job done.
The whole job took only a few hours.
Am so glad that I did not try to do this job myself, as was the original plan (handy homeowner vs professional, professional wins!).
We would certainly recommend WHO, and certainly John Fantham.