Water Heaters Only
Company Overview
Water Heaters Only is Concord's trusted expert for all water heater needs. We handle repairs, installations, and replacements for every system type. Our licensed technicians arrive fully stocked with specialized parts.
Unlike general plumbers, we master one craft perfectly. Emergency calls answered day or night at standard rates. Over 500,000 systems serviced since our founding.
Competitor quotes don't stand a chance against our rates. We stand behind our labor and materials completely.
No waiting for critical water heater repairs. Gas, electric, hybrid - we know every system inside out.
Decades of excellence prove our commitment. Your hot water emergency ends with one phone call.
**Specializing in:**
Tankless conversions done right
Thermocouple and anode rod replacements
Restaurant water heater upgrades
Emergency residential replacements
The original water heater-only concept started here. We still answer every call with live experts. 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.