100+ Free WI Plumber Practice Questions
Pass your Wisconsin Journeyman Plumber License Exam exam on the first try — instant access, no signup required.
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Key Facts: WI Plumber Exam
70%
Passing Score
Wisconsin DSPS
~100
Exam Questions
PSI exam format
3 hrs
Time Limit
PSI
SPS 381-387
Code Base
Wisconsin State Plumbing Code
The Wisconsin journeyman plumber exam is administered through PSI and overseen by DSPS. The exam has approximately 100 questions with a 3-hour time limit, requiring 70% to pass. Wisconsin uses its own state-specific plumbing code (SPS 381-387, formerly Comm 81-87) — NOT the IPC or UPC. Key Wisconsin-specific topics include frost closure vent requirements, POWTS regulations, and the statewide cross-connection control program.
About the WI Plumber Exam
Wisconsin journeyman plumber licensing exam administered by PSI and overseen by DSPS. Based on the Wisconsin State Plumbing Code (SPS 381-387, formerly Comm 81-87) — Wisconsin is one of the few states with its own independent plumbing code rather than adopting the IPC or UPC. Includes unique frost protection, POWTS, and cross-connection control requirements.
Questions
100 scored questions
Time Limit
3 hours
Passing Score
70%
Exam Fee
$180 (Wisconsin Department of Safety and Professional Services (DSPS))
WI Plumber Exam Content Outline
Drainage Systems
Drain pipe sizing, fixture units, slope requirements, cleanouts, 4-inch minimum building sewer, indirect waste, and Wisconsin-specific drainage requirements
Water Supply Systems
Water pipe sizing, WSFU calculations, backflow prevention, Wisconsin cross-connection control program, water heaters, and pressure regulation
Venting Systems
Vent sizing, wet venting, circuit venting, vent termination, Wisconsin frost closure requirements (12-inch minimum, 3-inch through-roof), and trap seal protection
Fixtures & Appliances
Fixture installation, clearances, accessible fixtures, commercial fixtures, scald prevention, and fixture counts per occupancy
Gas Piping
Gas pipe sizing, BTU calculations, appliance venting, pressure testing, CSST bonding, and combustion air requirements
Code Administration & Materials
DSPS licensing (apprentice/journeyman/master/master-restricted), permits, inspections, POWTS regulations, approved materials, and Wisconsin-specific code provisions
How to Pass the WI Plumber Exam
What You Need to Know
- Passing score: 70%
- Exam length: 100 questions
- Time limit: 3 hours
- Exam fee: $180
Keys to Passing
- Complete 500+ practice questions
- Score 80%+ consistently before scheduling
- Focus on highest-weighted sections
- Use our AI tutor for tough concepts
WI Plumber Study Tips from Top Performers
Frequently Asked Questions
How hard is the Wisconsin journeyman plumber exam?
The Wisconsin exam is challenging with an estimated 50-60% pass rate. It has approximately 100 questions and requires 70% to pass. Wisconsin's independent plumbing code (SPS 381-387) means study materials for the IPC or UPC alone are insufficient.
What plumbing code does Wisconsin use?
Wisconsin uses its own independent State Plumbing Code (SPS 381-387, formerly Comm 81-87). This is NOT the IPC or UPC. Wisconsin is one of the few states that maintains an independent plumbing code with unique provisions for frost protection, POWTS, and cross-connection control.
How much does the Wisconsin plumber exam cost?
The Wisconsin journeyman plumber exam fee is approximately $180, administered through PSI. Additional DSPS license fees may apply.
What license categories does Wisconsin have?
Wisconsin maintains apprentice, journeyman, master plumber, and master plumber-restricted categories. The master plumber-restricted license has a limited scope of work and is unique to Wisconsin.