Delaware plumber license requirements
2 facts reviewed by our editor against the official page. Passages marked “not yet reviewed” are copied word-for-word from official state pages (fetched 2026-10-17) and are pending human review — read them in context on the linked source.
| Item | Detail (with quote from the official source) |
|---|---|
| Exam | Individual worker license (DE Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners) Pass the exam with at least 70%. “Arrange for the Board to receive the exam results after you pass the exam with at least 70%.” Official source · verified 2026-10-17 · Master Plumber Licensure - Division of Professional Regulation - State of Delaware |
| Reciprocity & endorsement | Individual worker license (DE Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners) Master Plumber reciprocity: at least 7 years practicing as a Master in the reciprocating jurisdiction. “must submit proof of practicing a minimum of seven (7) years after receiving licensure as a Master in the reciprocating jurisdiction.” Official source · verified 2026-10-17 · Master Plumber Licensure - Division of Professional Regulation - State of Delaware |
Check a license in Delaware
Delaware does not publish a bulk license file we use; check with the licensing authority’s own search (see sources).
Questions to ask the board
- Which license level matches my experience, and do hours from another jurisdiction count?
- Is the exam open-book, and which code edition is used?
- Do I also need a city or county license where I will work?
- Is there a reciprocity or endorsement agreement with my current jurisdiction?
Sources checked: dpr.delaware.gov