Delaware Plumbing Exams

The Delaware Plumbing License Exam covers many topics including: Vents & Venting; Administrative Procedures; Fixtures; Drainage Systems and more.  Whether you live in Wilmington, Rehoboth Beach, Dover 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 Delaware. 

Who Grants a License:  Plumbing licenses are issued by the Delaware Department of State, Division of Regulation, Board of Plumbing.

Procedures for Getting a License:   Candidates for journeyman plumber licenses who do not have a  journeyman certificate from a  federally approved apprentice program and candidates for master plumber licenses must take an exam to obtain a license unless the candidate is already licensed in another state and meets Delaware's reciprocity standards.

Qualifications to take the Exam and receive a License: A candidate for a journeyman plumbing license, who does not have an approved journeyman certificate, can qualify to take the exam by showing at least 7 years of work experience with a licensed master plumber.  Once one qualifies as a journeyman plumber, one can take the master examination.

Test Content:   The exam for journeyman and master plumbers come in two parts, one for business and law and the other section on trade knowledge.  The exams are open book with limited reference materials permitted. The business and law section has 50 questions with a two hour time limit covering subjects such as estimating and bidding, safety/OSHA and tax laws. 

The journeyman and master plumber technical exams have 100 questions and a 4 hour time limit.  The journeyman and master exams cover the following subject areas with the corresponding number of questions:

     General Knowledge - 18

     General Regulations - 26

     Plumbing Fixtures - 6

     Water Supply Systems - 10

     Drainage, Waste and Sanitary Vents - 18

     Indirect Waste - 4

     Roof Drain Piping - 3

     Specialty Plumbing - 5

     Isometric Analysis - 10

How to Apply for the Test:  You can access the application for the plumbing license online at DPR.  You can register to take the exam by going to Prometric.     

Who Administers the Exam: Prometric 

Fees:  There are fees to take the test.

License Renewal:  Licenses must be renewed every other even year (i.e. 2010, 2012..).  There is no continuing education requirement.

Applicable Code:     Delaware follows the International Plumbing Code established by the International Code Council.


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.