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).
How Washington D.C. Compares Nationally
- Washington D.C.'s $100 plumbing exam fee runs a little above the national median of about $65.
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.
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According to the IPC, what is the drainage fixture unit (DFU) value for a residential water closet (1.6 gpf or less)?
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Practice for the Washington D.C. plumber exam
Use this state guide to understand the license requirements, then drill IPC and UPC practice in your browser with pipe-sizing tools. Web access and native app purchases are separate.
Washington D.C. Journeyman Plumber Exam — Frequently Asked Questions
How do I get my journeyman plumber license in Washington D.C.?
In Washington D.C., the journeyman plumber license is issued by DC Department of Consumer and Regulatory Affairs (DCRA). The exam uses the DC Plumbing Code (IPC-based) and is administered by PSI Exams. You need 4 years of experience. The exam fee is $100 and the passing score is 70%. DC issues its own plumber license. DC uses an IPC-based code with local amendments.
What plumbing code is used in Washington D.C.?
Washington D.C. uses the DC Plumbing Code (IPC-based) for its journeyman plumber exam. The exam has 80 questions with a passing score of 70%. The exam is administered by PSI Exams.
What is the difference between IPC and UPC on the plumber exam?
Washington D.C. uses the International Plumbing Code (IPC). The IPC exam covers water supply, drainage, venting, fixtures, and pipe sizing. Key tables to master: Table 604.4 (water supply sizing) and Table 710.1 (drainage fixture units). The IPC is used by the majority of U.S. states.
What is the best app to study for the Washington D.C. plumber exam?
VoltExam offers Washington D.C. journeyman plumber exam prep on the web with IPC/UPC practice questions, explanations, state guidance, and built-in pipe sizing tools. Native mobile apps are available separately for offline study.