Plumbing license reciprocity by state · Pair verdict
Your Pennsylvania license, Washington's rules. This page computes the pair the boards leave you to guess at — the full checker adds your license status and level.
No endorsement
Idaho ONLY at journey level: email a copy of your active Idaho journey level card and government photo ID to L&I for a reciprocal certificate. All other out-of-state plumbers may present a comparable license (or equivalent U.S. military experience) for consideration but must pass the Washington exam; approved out-of-state licensees may buy a one-time 120-day temporary permit ($100.30) while waiting to test.
Washington's journeyman gate, for the exam route: 8,000 hours with category minimums · exam $202.10. One rule outranks the pair: a lapsed Pennsylvania license endorses nowhere — reinstate at home first.
Rules as published by Washington State Department of Labor & Industries (L&I) — Plumber Certification Program, checked October 22, 2026. Confirm with the board before you apply.
No state license — city/county licensing
Journeyman gate: not published hours · Fees not published
State ladder: apprentice → journeyman → master
Journeyman gate: 8,000 hours · Exam $202.10 · License $242.70
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