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Service Alert

If there's a state government shutdown due to lack of a 2017 – 2019 Washington budget, many services provided by the Department of Labor & Industries would not be available starting July 1. L&I has a full list of service interruptions should there be a full or partial shutdown.


About the Plumber Certification Program

Information about the Plumber Certification program.

Training & Continuing Education

View test dates and locations and find out about continuing education requirements.


Find out how to get or renew your plumber or plumber trainee certificate, or your medical gas endorsement and pay the related fee.

L&I Compliance Inspectors

Find out how to contact your local compliance inspector.

Plumber Forms & Publications

Get electronic forms and publications for plumber certificates and renewals.

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