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Drain Doctor · Covina & SGV

Water heater repair & replacement in Covina

Water heater repair, replacement, and tankless installs for Covina & the SGV.

Walnut dispatch. We serve Covina, Glendora, Pomona, Chino Hills, and communities across the San Gabriel Valley and nearby L.A. & San Bernardino Counties. Our service regions →

Call (626) 332-9984

Current special — same value as our all offers page

Limited-time diagnostic visit

Water Heater Repair Diagnostic

What you get from Drain Doctor:

  • We will come to your home
  • Diagnose the problem with your water heater system
  • Provide a comprehensive report on the problem
  • Present you with personalized solutions on what to do next
  • If we do the work we will waive the diagnostic charge!
  • 100% satisfaction guaranteed
  • Includes 100% Satisfaction Guaranteed
CALL US NOW (626) 332-9984

Call for Conditions & Restrictions. *Some restrictions or conditions may apply, call for details. Offer may be subject to credit approval. Must present offer at time of service. Not available to combine with other offers/promotions.

1996 Serving the Valley
24/7 Emergency Service
#803591 CA Licensed
Same Day When You Need Us

When your water heater fails or underperforms, you need a plumber who can diagnose quickly and repair or replace as needed. We handle water heater repair and replacement in Covina and the San Gabriel Valley—tank and tankless models, tune-ups, full replacements when the unit is at end of life, and new installations. Same-day and emergency service are available so you are not left without hot water.

How we help

What We Do

We'll identify why your water heater isn't working—whether it's the pilot, thermostat, elements, sediment, or something else. Many issues can be repaired on the spot. When repair isn't cost-effective or the tank is leaking, failing, or too old, we'll walk you through replacement options (similar capacity, energy-efficient upgrades, tankless conversions) and install the unit to code. See a recent tank-to-tankless upgrade below for what that kind of project can look like in a real home.

Water Heater Repair & Replacement in action — Drain Doctor Covina

Local experts

Built for Covina & the Valley

Same-day scheduling, clear estimates, and technicians who know the area. Start with our Covina plumber page, see where we dispatch, read why homeowners choose Drain Doctor, or request service.

Call (626) 332-9984
Drain Doctor team serving Covina and the San Gabriel Valley

Recent project

Tank to tankless water heater upgrade

We replaced an aging 75-gallon tank water heater with a new tankless system—giving the homeowner continuous hot water, better efficiency, and a more compact setup in the same closet.

Before

Before: 75-gallon tank water heater in a utility closet
Existing 75-gallon tank water heater

After

After: wall-mounted tankless water heater with new copper piping
New tankless water heater install
  • Removed the existing 75-gallon tank water heater
  • Installed a new tankless water heater
  • Provides endless hot water for daily household needs
  • Improves overall energy efficiency
  • Saves space with a more compact system design

The homeowner can now enjoy continuous hot water without running out during busy mornings or back-to-back showers—a smart upgrade that adds comfort, efficiency, and value.

Why homeowners choose us

Drain Doctor for Water Heater Repair & Replacement

Water heater work can be dangerous and code-sensitive. Our technicians are licensed and experienced. We don't push unnecessary replacements—we'll recommend repair when it makes sense and honest water heater replacement when it's the safer or better long-term choice.

Licensed & insured

California-licensed plumbers, fully insured for your peace of mind.

24/7 emergency

Same-day and after-hours dispatch when you need help fast.

Estimates in writing

We review scope with you before we start—no surprise add-ons.

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Book online

Pick a time that works for you. Questions? Call us or use Request Service.

Returning customer? Customer portal →

24/7 emergency response

Emergency plumbing—We're prepared, anytime

Burst pipes, major leaks, or sewer backups? Don't wait. Our licensed plumbers are available day or night with the right tools to stop damage and fix the problem.

(626) 332-9984

24/7 Emergency Service · Same-day dispatch when you need it most

Dispatch & office

Our Walnut headquarters

Drain Doctor Plumbing & Rooter

3820 Valley Blvd Unit O
Walnut, CA 91789

Open in Google Maps (626) 332-9984

Where we work

Service regions

We’re your local plumbing company—not a referral site. Trucks roll from Walnut across the San Gabriel Valley and into nearby parts of Los Angeles and San Bernardino Counties. Each region below has its own page with neighborhoods we talk about most often.

Also serving

See our other service areas →

Don’t see your city? Contact us—we may still be able to help.

Call (626) 332-9984