All Journeymen and Residential Specialty Plumbers must complete 16 hours of continuing education within a 2-year renewal cycle. Plumber Trainees must complete 8 of the required 16 hours every year. All of these courses must be taken within the renewal cycle. The 16 hours must contain a minimum of 8 hours of code and a minimum of 4 hours of industry related electrical (IRE). The other 4 hours may come from any category (code, IRE, IRP). Here is a link to the state website: http://www.lni.wa.gov/tradeslicensing/plumbing/testcert/conted/