Maryland Plumbing Exams

The Maryland Plumbing License Exam covers many topics including: Vents & Venting; Administrative Procedures; Fixtures; Drainage Systems and more.  Whether you live in Baltimore, Annapolis, Cumberland or another city or county, the resources below will help you get started:

Need of a License:  Journeyman and master plumbers need a license to work in Maryland.

Who Grants a License:  Plumbing licenses are issued by the Maryland Department of Labor, Licensing and Regulation (DLLR)

Procedures for Getting a License:  A candidate for a journeyman or a master plumbing license must take and pass a written exam.   Exams are given weekly in Baltimore, College Park, Salisbury and Hagerstown.

Qualifications to take the Journeyman Plumber Exam and receive a License: A candidate must have held an apprentice license for at least 4 years, completed 7,500 hours of training under the supervision of a master plumber and completed 32 hours in backflow prevention device testing.

Qualifications to take the Master Plumber Exam and receive a License:  A candidate must have held a journeyman license for at 2 years and must have completed 3,700 hours of training under a licensed master plumber.

Who Administers the Test:  PSI Examination Services

How to Apply for the Exam:  To apply to take the exams, contact the following:

     PSI Examination Services

     100 West Broadway, Suite 1100

     Glendale, CA 91210-1202


Fees:  There are fees to take the test.

License Renewal:  Licenses must be renewed every two years.  There is no continuing education requirement.

Applicable Code:  Maryland has adopted the International Plumbing Code developed by the International Code Council and local municipalities may use different editions.


For more information on licensing and exam preparation, go to's

Journeyman Plumbing Test Guide

Master Plumbing Test Guide

And take's Plumbing Practice Test.

For plumbing exam preparation products and services, such as study guides, practice tests, flashcards and courses, go to's Journeyman Plumber Exam and Master Plumber Exam listings.