100+ Free MN Plumber Practice Questions
Pass your Minnesota Journeyman Plumber License Exam exam on the first try — instant access, no signup required.
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Key Facts: MN Plumber Exam
70%
Passing Score
MN Dept of Labor
240 pts
Exam Points
State exam format
5.5 hrs
Time Limit
Longest in US
MPC
Code Base
State-specific
The Minnesota journeyman plumber exam is administered by the Department of Labor and Industry as a paper exam. At 5.5 hours and 240 points, it is one of the longest plumbing exams in the nation. Minnesota uses its own Minnesota Plumbing Code (MPC) — neither IPC nor UPC. The exam requires 70% (168/240 points) to pass. Candidates must study the MPC specifically, as it has significant differences from national model codes.
About the MN Plumber Exam
Minnesota journeyman plumber licensing exam administered by the Department of Labor and Industry. State-administered paper exam based on the Minnesota Plumbing Code (MPC), a completely state-specific plumbing code — not IPC or UPC. The exam is 240 points over 5.5 hours, making it one of the longest plumbing exams in the country. Requires 70% (168 points) to pass.
Questions
120 scored questions
Time Limit
5.5 hours
Passing Score
70%
Exam Fee
~$250 (Minnesota Department of Labor and Industry)
MN Plumber Exam Content Outline
Drainage Systems
Drain pipe sizing, fixture unit calculations, slope requirements, cleanouts, building sewers, indirect waste, and special drainage per Minnesota Plumbing Code
Water Supply Systems
Water pipe sizing, fixture unit calculations, backflow prevention, pressure regulation, water heaters, cross-connection control per MPC
Venting Systems
Vent sizing, wet venting, circuit venting, air admittance valves, vent termination, combination waste and vent per Minnesota code
Fixtures & Appliances
Fixture installation, clearances, accessible fixtures, commercial fixtures, water closets, lavatories, showers, and bathtubs per MPC
Code Administration & Minnesota Regulations
Minnesota plumbing licensing rules, permits, inspections, plan review, and MPC-specific administrative requirements
Materials, Joints & Special Systems
Approved materials, pipe materials, joint methods, hangers and supports, medical gas, storm drainage, and sewage ejectors per MPC
How to Pass the MN Plumber Exam
What You Need to Know
- Passing score: 70%
- Exam length: 120 questions
- Time limit: 5.5 hours
- Exam fee: ~$250
Keys to Passing
- Complete 500+ practice questions
- Score 80%+ consistently before scheduling
- Focus on highest-weighted sections
- Use our AI tutor for tough concepts
MN Plumber Study Tips from Top Performers
Frequently Asked Questions
How hard is the Minnesota journeyman plumber exam?
The Minnesota journeyman plumber exam is one of the most challenging in the country with an estimated 45-55% pass rate. At 240 points over 5.5 hours, it is also one of the longest. Minnesota uses its own state-specific plumbing code (MPC), not the IPC or UPC, which means code books and study materials from other states do not apply.
What plumbing code does Minnesota use?
Minnesota uses the Minnesota Plumbing Code (MPC), a completely state-specific plumbing code. It is NOT based on the IPC or UPC. The MPC has unique requirements for drainage, venting, water supply, and fixtures that differ significantly from national model codes. Candidates must study the MPC specifically.
Why is the Minnesota plumber exam 5.5 hours?
Minnesota's 5.5-hour exam with 240 points is one of the longest plumbing exams in the nation. The extended time reflects the comprehensive nature of the exam, which covers all aspects of the Minnesota Plumbing Code in depth. The paper format also requires more time than computer-based exams. Pacing is critical — allocate time proportionally across sections.
How much does the Minnesota plumber exam cost?
The Minnesota journeyman plumber exam fee is approximately $250. Additional costs include the Minnesota Plumbing Code book. Check with the Minnesota Department of Labor and Industry for the current fee schedule and exam dates.