Delaware Plumbing License Requirements
Yes. Delaware licenses plumbers through the Delaware Board of Plumbing, HVAC and Refrigeration Examiners (DPR). It issues master and contractor credentials.
State plumber license · By BrazeJobs Team · Updated
License tiers
| Apprentice | No state license |
| Journeyman | No state license |
| Master | Master Plumber |
| Contractor | Master |
Requirements
| Journeyman experience | Journeyman/apprenticeship + 2 years, or 7 years |
| Exam | Prov exam (70%) |
| Fees | Application $173 |
| Renewal | 2 years |
| Continuing education | 5 hours per renewal (3 code, 1 safety + 1 more); due Oct 31 even years from 2026 |
| Local license | No (state license covers) |
| Board | Delaware Board of Plumbing, HVAC and Refrigeration Examiners (DPR) |
Exam
| Exam provider | ProV (for Plumbing and HVACR Board) |
| Passing score | 70% |
Board approves candidates for master exams; ProV runs licensure exams and ABC Delaware runs the apprenticeship-bypass exam. Minimum score 70%.
- Source: dpr.delaware.gov · checked November 6, 2026
Licensed in another state or the military
| Military spouses | Military Registration under SCRA for duration of PCS orders; provisional license up to 6 months while application pending (members and spouses) |
- Source: dpr.delaware.gov · checked November 6, 2026
Apprenticeship
| Registering agency | State Apprenticeship Agency |
- Source: apprenticeship.gov · checked November 6, 2026
Plumbing code
| Code in force | 2021 IPC with state amendments |
Adopted by the Division of Public Health, 16 DE Admin Code 4455
- Source: regulations.delaware.gov · checked November 5, 2026