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How to get a plumber license in Maryland

Hours, exam, fees, renewal and continuing education for Maryland plumbing licenses, pulled from official MD sources and checked .

Quick answer
  • Licensing body: Maryland State Board of Plumbing (Department of Labor, Division of Occupational and Professional Licensing)
  • State journeyman license: Yes (The Board issues Journey Plumber/Gas Fitter licenses statewide. Baltimore County and WSSC also license plumbers locally with limited reciprocity to the State Board.)
  • Journey Plumber/Gas Fitter: Held an apprentice plumber/gas fitter license for at least 4 years; completed at least 7,500 hours of training under a licensed master plumber; completed 32 hours of Board-approved backflow prevention device testing training; pass the comprehensive written exam. Up to 1,500 school hours may count toward the 7,500 (Board/statute).
  • Exam: open book, via PSI (prior approval required)
  • Code edition: PSI open-book journey exam references include 2018 IPC and 2018 IFGC (confirm current Candidate Information Bulletin before you schedule).

Requirements by license

Journey Plumber/Gas Fitter

ExperienceHeld an apprentice plumber/gas fitter license for at least 4 years; completed at least 7,500 hours of training under a licensed master plumber; completed 32 hours of Board-approved backflow prevention device testing training; pass the comprehensive written exam. Up to 1,500 school hours may count toward the 7,500 (Board/statute).Source: labor.maryland.gov · as of · FAQ: labor.maryland.gov
ExamPSI (prior approval required). Open book. Journey Plumber/Gas Fitter: 100 questions, 70% to pass, 240 minutes, open book with listed references. Apply/upload hours and backflow certificate via PSI; after passing, apply to the Board for the license within 1 year of the exam.Source: labor.maryland.gov · as of · Board exam page: labor.maryland.gov
Fees
  • PSI Journey Plumber/Gas Fitter exam: $65
  • Original Journey Plumber/Gas Fitter license: $43.50
  • Renewal Journey Plumber/Gas Fitter: $43.50
Source: labor.maryland.gov · as of · Exam fee from Board-hosted PSI bulletin: labor.maryland.gov Fee schedule updated July 1, 2025.
RenewalEvery 2 years. Expires two years from date of issue. Electronic renewal notice ~60 days prior. If expired more than 4 years, reapply and retest.Source: labor.maryland.gov · as of
CE to renewBoard FAQ: no continuing education requirements to maintain a Maryland plumber license. (Inspector ID cards need 8 hours/year — separate credential.)Source: labor.maryland.gov · as of

License types in Maryland

  • Apprentice Plumber/Gas Fitter
  • Journey Plumber/Gas Fitter
  • Master Plumber/Gas Fitter
  • Natural gas fitter licenses
  • Propane gas fitter certificate
  • Plumbing inspector identification card
Source: labor.maryland.gov · as of

Reciprocity (licensed in another state?)

Board reciprocates only with Delaware (master plumber/gas fitter), WSSC, and Baltimore County (journey/master plumbing+gas as applicable). Contact WSSC or Baltimore County directly for their local cards.Source: labor.maryland.gov · as of

What we couldn't confirm yet

We only publish what we can tie to an official source. These items aren't published anywhere we could verify, so ask the office listed:

FAQ

Does Maryland license journey plumbers statewide?

Yes. The State Board of Plumbing issues Journey Plumber/Gas Fitter licenses after apprenticeship hours, backflow training and the PSI exam.

How many hours does a Maryland journey plumber need?

At least 7,500 hours over 4 years as a licensed apprentice under a master plumber, plus 32 hours of approved backflow training.

Already licensed? See Maryland plumber license renewal & CE requirements.

Other states

Compare every state side by side: license requirements by state · renewal & CE by state.