Michigan LARA license exam · given by PSI
Journey Plumber practice test
Practice for the Michigan journey plumber written exam with original questions referenced to the 2021 Michigan Plumbing Code: drainage, venting, fixtures, water distribution, backflow, special waste, testing, and isometrics. (241 questions total: 10 free + 231 in the paid pass.)
Exam format from the PSI candidate bulletin. Exam fee: $100.
Practice the Journey Plumber exam
Topic drills (pass required)
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Review status: pending licensed plumber review. These are original questions written to the PSI content outline and referenced to the 2021 Michigan Plumbing Code. Calculations were checked by script, but no licensed plumber has reviewed them yet, so we don’t claim they are expert-reviewed. Spot an error? Use “Report this question” on any item.
What’s on the exam
| Topic | Our estimated weight | In our mock | Bank |
|---|---|---|---|
Michigan law and code administration (PA 407, PA 230)
| 6% | 8 | 16 |
General regulations, definitions, and protection of piping
| 8% | 10 | 21 |
Fixtures, faucets, and fixture fittings
| 9% | 11 | 22 |
Water heaters
| 5% | 6 | 12 |
Water supply and distribution
| 12% | 15 | 27 |
Backflow prevention
| 8% | 10 | 19 |
Sanitary drainage
| 13% | 16 | 32 |
Indirect and special waste
| 4% | 5 | 10 |
Vents
| 12% | 15 | 28 |
Traps, interceptors, and separators
| 6% | 8 | 16 |
Storm drainage
| 4% | 5 | 10 |
Inspection and testing
| 6% | 7 | 13 |
Isometrics and plumbing math
| 7% | 9 | 15 |
About the weights: PSI lists the content areas but not how many questions come from each. These weights are our estimate.
Test-day facts
- Computer-based at PSI test centers, after LARA approves your application.
- Open book: the 2021 Michigan Plumbing Code with chapter tabs only, plus printed PA 230 and PA 407, each bound with three staples and unmarked.
- A separate practical exam is also required; LARA schedules it by email.
Sources: PSI Candidate Information Bulletin 4605 (plumbing, effective Apr 29, 2026) · LARA plumbing exam information. Checked October 30, 2026. Rules and fees change, so confirm with LARA and PSI before you apply.
Journey Plumber exam FAQ
How many questions are on the Michigan journey plumber exam?
PSI’s bulletin lists 125 questions in 180 minutes, and you need 75% to pass.
Is the journey plumber exam open book?
Yes. You may bring the 2021 Michigan Plumbing Code (chapter tabs only) and printed copies of PA 230 and PA 407, with no highlighting, marks, or tabs.
Is there a practical exam?
Yes. PSI says journey plumber applicants who applied after December 15, 2021 complete two exams: the written exam and a practical exam you request from LARA by email.
What does the exam cost?
PSI lists a $100 exam fee, valid for one year.
Are these the real exam questions?
No. MI Trade Prep questions are original practice items written to PSI’s published content outline. They are not actual exam questions, and MI Trade Prep is not affiliated with LARA or PSI.
Study guide: Michigan journey plumber exam: format and study plan