100+ Free IA Plumber Practice Questions
Pass your Iowa Journeyman Plumber License Exam exam on the first try — instant access, no signup required.
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Key Facts: IA Plumber Exam
70%
Passing Score
Iowa Plumbing and Mechanical Systems Board
100
Questions
3 hours limit
$25 + $50-240
Exam Fee
PSI
UPC
Code Base
Iowa adoption
Iowa's journeyman plumber exam is based on the UPC (Iowa State Plumbing Code) and administered by PSI. Iowa uses the UPC rather than the IPC. The Iowa State Plumbing Code includes amendments for cold climate conditions and rural water/sewer systems. The exam requires 70% to pass and tests drainage, water supply, venting, gas piping, and fixture knowledge.
About the IA Plumber Exam
Iowa journeyman plumber exam administered by PSI under the Plumbing and Mechanical Systems Board. Based on the Uniform Plumbing Code (UPC) with Iowa amendments. Tests drainage, water supply, venting, gas piping, and Iowa-specific requirements.
Questions
100 scored questions
Time Limit
3 hours
Passing Score
70%
Exam Fee
$25 + $50-240 (Iowa Plumbing and Mechanical Systems Board)
IA Plumber Exam Content Outline
Drainage & Waste Systems
Drain sizing, DFU calculations, slope requirements, cleanouts per UPC
Water Supply & Distribution
Pipe sizing, backflow prevention, water heaters, pressure regulation per UPC
Venting Systems
Vent sizing, wet venting, AAVs, vent termination, circuit venting per UPC
Gas Piping
Gas pipe sizing, appliance venting, pressure testing, BTU calculations per IFGC
Fixtures, Materials & Iowa Code
Fixture installation, materials, joints, permits, inspections, and Iowa-specific requirements
How to Pass the IA Plumber Exam
What You Need to Know
- Passing score: 70%
- Exam length: 100 questions
- Time limit: 3 hours
- Exam fee: $25 + $50-240
Keys to Passing
- Complete 500+ practice questions
- Score 80%+ consistently before scheduling
- Focus on highest-weighted sections
- Use our AI tutor for tough concepts
IA Plumber Study Tips from Top Performers
Frequently Asked Questions
What code does Iowa use for the plumber exam?
Iowa uses the UPC (Iowa State Plumbing Code). The exam covers drainage, venting, water supply, gas piping, and fixture requirements as adopted by the state.
Who administers the Iowa plumber exam?
The exam is administered by PSI under the Iowa Plumbing and Mechanical Systems Board.
How many questions are on the Iowa plumber exam?
The Iowa plumber exam has approximately 100 questions with a 3 hours time limit. A score of 70% is required to pass.
Is the IA plumber exam open book?
Most PSI-administered plumber exams allow a bound copy of the adopted code. Check with the Iowa Plumbing and Mechanical Systems Board for approved reference materials.