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Mainline Plumbing Group

Plumbers · 2490 Oak Ave, Portland, OR 97232

4.7 (474 reviews) · 32 years in business
  • Licensed & Insured
  • ⚡ 24/7 Emergency
  • License #OR-199258

Call now: (372) 624-7464

About Mainline Plumbing Group

Founded in 1994 in Portland, OR, Mainline Plumbing Group has grown into one of the most trusted independent well-respected plumber shops in the area. The crew specializes in residential service work — leaks, clogs, water heater service and replacement, gas lines, fixture upgrades, repipes, and sewer line repair — and is well known for the lengthy "we will not start work without explaining the price first" written estimate it provides on every visit. Backed by a 100% satisfaction guarantee and an active state license, Mainline Plumbing Group is a popular pick for both single-job homeowners and rental property managers across Portland.

Mainline Plumbing Group serves homeowners across Portland, OR and surrounding ZIP codes including 97201, 97209, 97214, 97217, 97232. Pricing is up-front and quoted in writing before any work begins, with no obligation if the estimate isn't right for your project.

Services offered

  • Tankless water heater specialist
  • Sump pump install
  • 24/7 emergency response
  • Water filtration systems
  • Gas line install & repair
  • Garbage disposal service

Service area

Mainline Plumbing Group covers Portland and the surrounding metro, typically responding to addresses within 25–35 miles of 97232. Same-day appointments are commonly available for non-emergency requests booked before noon, and 24/7 emergency dispatch is offered for active leaks, electrical hazards, no-heat/no-cool calls, and lockouts when applicable.

Licensing & insurance

FixNearMe verifies that Mainline Plumbing Group holds an active OR contractor license (#OR-199258) and carries general liability insurance covering work at residential properties. We re-verify licensing annually and remove any pro whose status lapses or whose review pattern deteriorates.

How to request a quote

Use the free quote form on this page to send your job details directly to Mainline Plumbing Group and up to two other nearby plumbers in Portland. You'll receive up-front written quotes — usually within an hour during business hours — so you can compare apples to apples before booking.

Recent customer reviews

★★★★★
Veteran-owned and it shows — disciplined, organized, on time, and the workmanship is meticulous. I will absolutely call them again.
— Anthony P., Portland
★★★★★
They diagnosed an issue three other contractors had missed. Fixed it in two hours and didn't charge for the diagnostic visit. Easy 5 stars.
— Karen W., Portland
★★★★★
Used them twice now. Always punctual, polite, and the work has held up perfectly. Saving them in my phone for next time.
— Priya S., Portland

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