Washington Plumbing Contractor/Journeyman

Requirements to Obtaining your License

Plumbing must be conducted through registered contractors.
Experience requirements are 6,000 hours for Residential Specialty and 8,000 hours, of which 4,000 must be commercial, for Journeyman.
All applicants for journeyman and residential specialty exams are required to have completed, prior to testing, 16 hours of continuing education with a minimum of 4 hours of that being electrical.

Work that can be Done Under this License

Allows the installation, alteration, or repair of potable water, liquid waste, and medical gas systems within a building in the state of Washington you must be certified by the Department of Labor and Industries. The Department issues trainee, journeyman, and specialty/residential plumber certificates, and medical gas piping installer endorsements.

Applying to get your License

Journeyman application/exam fee is $139. Contractor Registration fee is .

Department of Labor and Industries
PO Box 44470
Olympia, WA 98504-4400
(360)902-5207

Reciprocity Agreements

Reciprocal agreements exist with Oregon and Montana.

Continuing Education

All journeyman and residential specialty plumbers must obtain 16 hours of continuing education within a two-year renewal cycle. Plumber trainees must complete 8 of the required 16 hours every year. All of these required courses must be taken within the renewal cycle.

Exam Details

Minimum score of 70%
The 3-part examination consists of Uniform Plumbing Code questions, a waste and vent pipe sizing drawing and a water pipe sizing drawing.