Mainline Drain Service LLC

Plumbing · Federal Way, WA · License #MAINLDS851JP

Subser ConfidenceListedActive WA license

WA L&I status: RE-LICENSED

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Active license on file — checked against WA L&I records, updated daily.

Source:License facts on this pageVerify at WA L&I

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License facts

Mainline Drain Service LLC is one of 10 Plumbing contractors registered in Federal Way, registered with WA L&I since 2015. Registered longer than roughly 25% of Plumbing contractors in Federal Way. License current through Apr 2023.

License type
CONSTRUCTION CONTRACTOR
Effective date
Apr 17, 2015
Expiration date
Apr 20, 2023
UBI
603397549
Business type
Limited Liability Company
Phone
(206) 294-9691
Location
Federal Way, WA 98023

Source: WA L&I contractor registration — checked Aug 15, 2026. Applies to every row above.

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Bond & insurance on file

Bond firmAmountEffectiveExpiration
Navigators Ins Co$6,000Apr 13, 2020Canceled May 14, 2023
What the bond and insurance requirements mean for homeowners

To register as a specialty contractor in Washington, a business must file a $15,000 surety bond with the Department of Labor & Industries; general contractors file $30,000.

The bond is a limited fund a homeowner (or subcontractor or supplier) can make a claim against, through the courts, if a registered contractor fails to meet its obligations on a job. Contractors must also keep general liability insurance on file — at least $50,000 in property damage and $200,000 in public liability coverage, or a $250,000 combined single limit — which covers damage the contractor causes, not workmanship disputes. The rows above are the bond and insurance filings L&I publishes for this registration; whether a specific filing applies to a specific project depends on its dates and terms.

What is a Plumbing contractor licensed to do in Washington?

A plumbing specialty contractor registration with WA L&I covers plumbing installation and repair work. Individual plumbers in Washington are additionally certified through a separate state plumber-certification program; the contractor registration shown here is the business-level registration. As a condition of registration, contractors in this category file a $15,000 surety bond and proof of general liability insurance with WA L&I. Washington currently lists 10 Plumbing contractors registered in Federal Way.

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Built from Washington State L&I public records, updated Aug 15, 2026. Subser doesn't do star ratings or reviews — just verified records.