Delaware to Wisconsin: journeyman plumber license reciprocity

Wisconsin issues a statewide Journeyman Plumber license through the Department of Safety and Professional Services (DSPS); under Wis. Stat. 145.06 no person may engage in or work at plumbing in the state unless licensed by DSPS, and there is no municipal plumber licensing. Under SPS 305.93 a journeyman works under the general supervision of a Master Plumber, Master Plumber Restricted or Utility Contractor licensee, qualifies by completing a plumbing apprenticeship under Wis. Stat. ch. 106, and must complete 24 hours of approved continuing education to renew. A new applicant files Form 3126 (with the Form 3126T experience table) in the LicensE portal at license.wi.gov, is made eligible to test, and must pass the DSPS journeyman plumber examination, which is a two-part, open-book exam with a 70% passing score covering Wis. Stat. ch. 145, SPS 305, the SPS 381-387 plumbing code, NFPA 13D/24 and the POWTS component manuals (the updated plumbing code applies to exams from October 1, 2026). DSPS's plumber pages name no reciprocity states, and the electrical reciprocity statute (Wis. Stat. 101.874) does not extend to plumbers.

Delaware does not issue a journeyman or journeyperson plumber license. The Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners licenses only master plumbers (and master HVACR / master HVACR restricted), and 24 Del. C. § 1807(c)(1) lets an apprentice, journeyman, mechanic or other person provide plumbing services without a Board license while working under the supervision of a master plumber who is their employer or a full-time employee of the same business. An out-of-state journeyman plumber license therefore has nothing to transfer to in Delaware and is neither required nor recognized as a Delaware credential for employment. Delaware's own 'journeyman's certificate' in 24 Del. C. § 1808(a)(1) is a certificate of completion from a plumbing apprenticeship that meets or exceeds federal BAT/OA standards, issued in any state: it is an experience credential used toward the Master Plumber license, not a license. With that certificate, two years of post-apprenticeship work under a master plumber (or a similar-level licensee in another state) qualifies an applicant for the master exam; without it, seven years of such supervised experience plus the apprenticeship equivalency (bypass) tests are required. Out-of-state journeyman hours gained under a licensed master count toward those master-exam experience requirements.