Plumber Exam Prep / Washington D.C.
Plumber Exam — DC
Journeyman Plumber Exam in Washington D.C.
Complete breakdown of the journeyman plumber licensing process in Washington D.C. — code used, exam provider, and what to study.
Exam Details
- Licensing Body
- DC Department of Consumer and Regulatory Affairs (DCRA)
- Exam Provider
- PSI Exams
- Code Edition
- DC Plumbing Code (IPC-based)
- Passing Score
- 70%
- Question Count
- 80
- Exam Fee
- $100
- Experience Required
- 4 years
Note: Always verify current requirements with DC Department of Consumer and Regulatory Affairs (DCRA).
Washington D.C. Plumber License — What to Know
DC issues its own plumber license. DC uses an IPC-based code with local amendments.
Key Code Sections to Master
The International Plumbing Code (IPC) exam covers water supply, drainage, venting, fixtures, water heaters, storm drainage, and special piping. Focus on the table for pipe sizing (Table 604.4 for water supply, Table 710.1 for drainage fixture units), minimum fixture requirements by occupancy type, and venting rules. Drainage fixture units (DFUs) are frequently tested via calculation questions.