Requirements, license levels, and the issuing authority — sourced from Iowa's official board.
Statewide licensing covering plumbing, HVAC/refrigeration, mechanical, and hydronic disciplines under one board.
| Requirements | Journeyperson: at least 18 years old; complete four years of practical experience as an apprentice AND pass the Iowa journeyperson exam for each discipline (or hold an out-of-state master license in the same discipline). Master: hold a journeyperson license with two years of work experience (or a master license in another jurisdiction) and pass the exam. |
| Reciprocity | Exam-waiver reciprocity noted for out-of-state licensees (official plumbing page cites South Dakota; applicant must be a non-Iowa resident at application). Reciprocity granted for licenses obtained by exam with proof of good standing. |
| Renewal | Licenses expire June 30 on a three-year cycle; PMSB continuing education/training required (hours per PMSB rules). |
| Notes | Statewide licensing covering plumbing, HVAC/refrigeration, mechanical, and hydronic disciplines under one board. |
Sources: dial.iowa.gov · dial.iowa.gov · dial.iowa.gov. Always confirm current requirements with the issuing authority.
New licenses, ladder upgrades, classification changes and lapses, by market and credential tier. Read the quarterly free, or license the underlying data.