How to get a journeyman plumber license in Washington
Washington journeyman plumber licensing covers hours, prerequisites, exam path, fees, and renewal. Confirm current rules on the board source before you apply.
Verified on: 2026-09-14 · Board source
From the board
- Plumber Certification ## Becoming a Plumber You must be certified by the Washington State Plumber Certification Program to work in the plumbing trade in Washington.
- The plumbing trade includes all: - Potable water building supply and distribution pipes.
- - Accessories (appurtenances) within the property lines of the premises.
- - Medical gas and medical vacuum systems.
- Except for domestic pump and pump and irrigation sy
- Board page: Plumber Certification - L&I - WA.gov
Requirements overview
- Washington sets experience, education, and exam rules for journeyman plumber applicants
- Documented OJT or apprenticeship hours are common for journeyman / technician paths
- Master and contractor tracks usually add experience, exams, and firm paperwork
- Confirm current hour totals, affidavits, and fees on the state board before you apply
Exam
- See the Washington plumbing exam guide for vendor, scheduling, and prep
- LicenseFlo helps with paperwork and reminders — we do not sit the exam
Renewals
- Most credentials renew on a fixed cycle with mandatory CE or training
- Roster watch → intake → assemble → sign → submit
Related: Exam · Renewal and CE
Have LicenseFlo do it
From $79 per event. Text once; we collect photos, assemble the packet, and send a one-tap signature.