Idaho PSI Plumbing Exam Prep
Adaptive quizzes, full code walkthroughs, and mock exams built specifically for the Idaho PSI exam — 100 questions, 75% to pass, open book 2017 ISPC/2015 UPC.
STEP 01
8 exam-mapped modules, 19+ lessons with direct code references from the 2017 ISPC and 2015 UPC.
STEP 02
15 targeted questions per module with instant feedback and explanations tied to the exam section.
STEP 03
Full 100-question PSI-format exam with 4-hour timer, grid navigation, flagging, and pass/fail scoring.
Try it now — no sign-up
From the Fundamentals module. Instant feedback included.
What is the formula to convert PSI to feet of water head?
Weights reflect approximate distribution on the Idaho PSI exam.
Fundamentals & Regulations
10% of exam
3 lessons
Fixtures & Drains
12% of exam
4 lessons
Hot & Cold Water Supply
15% of exam
2 lessons
DFU & Drainage Sizing
15% of exam
2 lessons
Venting Systems
18% of exam
3 lessons
Code Navigation
10% of exam
1 lessons
Business & Licensing
8% of exam
4 lessons
Exam Preparation
12% of exam
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Is this for the Idaho PSI exam specifically?
Yes. Every module and question is mapped to the Idaho journeyman plumber PSI exam — 100 questions, 75% to pass, open book. Nothing generic.
Can I use my code book during the real exam?
Yes. The Idaho plumbing exam is open book. Our platform trains you to navigate the 2017 ISPC and 2015 UPC efficiently, so you can find answers fast under exam conditions.
How long until I'm ready?
Most students are exam-ready in 4–6 weeks of consistent study. Our adaptive engine surfaces your weak areas so you focus time where it counts most.