4.9/5 stars on Google 500+ reviews
(626) 332-9984 Existing clients

Since 1996 · Licensed #803591

Our services

Expert plumbing, drain, and sewer across Covina and the San Gabriel Valley—same-day and emergency when you need us.

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 →

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Drain Doctor crew — Joe Castro
Drain Doctor plumbing professional on a service call in the San Gabriel Valley
Drain Doctor crew — Issiah C
Drain Doctor plumbing service in the field
Drain Doctor plumbing service in the field
1996 Serving the Valley
24/7 Emergency Service
#803591 CA Licensed
Same Day When You Need Us

Find what you need

Jump to high-demand services, regional coverage, or contact us for same-day help.

What we do

Full-Service Plumbing & Drain Solutions

Drain Doctor Plumbing & Rooter has been serving Covina, West Covina, and the greater San Gabriel Valley since 1996. From routine plumbing repairs to emergency service, trenchless sewer to hydro-jetting and camera inspections, we offer the full range of plumbing and drain services you need—all with clear estimates, same-day availability, and 24/7 emergency dispatch.

Every job is done by our own licensed, background-checked technicians using our own equipment, so you get consistent quality and no rental markups. Browse service areas & regions, read the plumbing blog, or contact us when you need help in Covina, Glendora, Walnut, or a neighboring city.

Drain Doctor plumber at work

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Everything under one roof

From a dripping faucet to full sewer replacement—tap a service to learn how we handle it.

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Water Heater Services

Hot water is something you shouldn't have to wait for. We repair, replace, and install traditional and tankless water heaters—including full replacement when your unit is failing or at end of life—so you get reliable hot water without overpaying or dealing with multiple callbacks.

See our water heater repair & replacement page for details and to schedule service.

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Trenchless & Pipe Services

When your sewer or pipe needs repair or replacement, we don't always have to dig up your yard. Pipe lining, pipe bursting, and pipe descaling let us restore or replace lines with minimal disruption. We'll explain your options and recommend the approach that fits your property and budget.

Trenchless Sewer Line Repair — Drain Doctor Plumbing & Rooter, San Gabriel Valley

Trenchless Sewer Line Repair

Trenchless sewer repair with minimal digging.

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Pipe Lining — Drain Doctor Plumbing & Rooter, San Gabriel Valley

Pipe Lining

Cured-in-place pipe lining to restore pipes without excavation.

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Pipe Bursting — Drain Doctor Plumbing & Rooter, San Gabriel Valley

Pipe Bursting

Pipe bursting for pipe replacement with minimal disruption.

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Pipe Descaling — Drain Doctor Plumbing & Rooter, San Gabriel Valley

Pipe Descaling

Pipe descaling to remove scale and restore flow.

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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

Drain Doctor on the job in the San Gabriel Valley
Call anytime (626) 332-9984

Contact

Get in Touch

Whether you need routine service or have an urgent issue, we're here to help. Schedule your service today or call us for immediate assistance.

Book online

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

Returning customer? Customer portal →

Drain Doctor Covina

3820 Valley Blvd Unit O
Walnut, CA 91789

(626) 332-9984

draindoctor96@icloud.com

Hours

  • Monday–Friday: 8:00 AM – 5:00 PM
  • Saturday: 8:00 AM – 12:00 PM
  • Sunday: Closed

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.

Full service areas overview →

Call (626) 332-9984