Warnken's Water Works LLC

Backflow Specialty · Aberdeen, WA · License #WARNKWW782KB

Inactive

WA L&I status: OUT OF BUSINESS

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License facts

Warnken's Water Works LLC is one of 2 Backflow Specialty contractors registered in Aberdeen, registered with WA L&I since 2022.

License type
PLUMBING CONTRACTOR
Effective date
Jun 6, 2022
Expiration date
Jun 6, 2026
Suspend date
Apr 4, 2025
UBI
602852076
Business type
Limited Liability Company
Phone
(360) 532-8773
Location
Aberdeen, WA 98520

Source: WA L&I contractor registration — verified Aug 14, 2026. Applies to every row above.

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Bond & insurance on file

What the bond and insurance requirements mean for homeowners

Washington requires specialty contractors to file a $15,000 surety bond with the Department of Labor & Industries as a condition of registration ($30,000 for general contractors).

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 Backflow Specialty contractor licensed to do in Washington?

Backflow specialty contractors install, repair, and test backflow prevention assemblies — the devices that keep irrigation and other systems from siphoning contaminants into drinking water lines. Typical work includes installing assemblies on irrigation and fire lines and annual testing and repair. The registration requires a $15,000 surety bond and general liability insurance on file with WA L&I. Washington currently lists 2 Backflow Specialty contractors registered in Aberdeen.

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Built from Washington State L&I public records, updated Aug 14, 2026. No star ratings or reviews — verification only.