Iowa Journeyman Plumber Exam Prep

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Iowa Journeyman Plumber exam at a glance

The Iowa Journeyman Plumber exam has 75 questions and a time limit of 3 hours, and it is open book. That works out to about 2.4 minutes per question. The passing score is 75%. Figures are from the official candidate bulletin, checked October 9, 2026.

Questions75
Time3 hours
Passing score75%
BookOpen book

Confirm question count, time, open-book rules, and passing score on the live board bulletin before you sit. We do not guarantee a passing result. Source: Kirkwood Iowa state disciplines bulletin, checked October 9, 2026. How we source exam facts

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What’s included

20,000+ word study guide

Worked calculations, code-section breakdowns, exam traps, a key-terms glossary and a 30/60/90-day plan.

4 full-length practice exams

Original questions weighted to match the topic mix of the real exam.

300 practice questions

Every one with a written explanation and the code section behind the answer.

Same study guide and four exams on every term. You are choosing how long you can log in.

Instant accessSecure checkoutBuilt on current codes
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What this prep covers

  1. About the Iowa Journeyman Plumber license
  2. How Iowa licensing works
  3. Plumbing math and fundamentals
  4. How the plumbing code is organized
  5. Sanitary drainage, waste, and vent (DWV)
  6. Venting
  7. Water supply and distribution
  8. Fixtures, traps, and interceptors
  9. Water heaters, relief, and gas
  10. Backflow prevention and cross-connection control
  11. Fixtures required by occupancy, clearances, and accessibility
  12. Materials, joining, and storm drainage
  13. Inspection, testing, and isometrics
  14. Worked calculations
  15. Sample exam questions, solved
  16. Common mistakes and exam traps
  17. Key chapters and tables to tab
  18. Glossary of must-know terms
  19. Your 30 / 60 / 90 day study plan
  20. Exam-day strategy

Iowa Journeyman Plumber licensing, explained

About the Iowa Journeyman Plumber license

Iowa licenses plumbers through the Iowa Plumbing and Mechanical Systems Board, housed within the Department of Inspections, Appeals, and Licensing (DIAL). The Journeyman Plumber license authorizes you to perform plumbing work, generally under the responsibility of a master plumber. You earn it by completing at least four years of practical experience in a U.S. Department of Labor-registered apprenticeship program and passing the trade exam.

Your exam is built on the Uniform Plumbing Code (UPC) as adopted by Iowa — currently the 2024 UPC (641 Iowa Administrative Code 25.1(105)); always confirm the exact edition on the current candidate bulletin, since the exam is written to the adopted edition, not necessarily the newest. The two model codes — the Uniform Plumbing Code (UPC) published by IAPMO and the International Plumbing Code (IPC) published by the ICC — agree on the physics but differ in tables, fixture-unit values, and some sizing methods, so always work from the one your state adopted.

Know these scope facts cold: the license is held by the individual; most work requires a permit and inspection (rough-in/top-out and final); you must work within the classification you hold; and unlicensed or out-of-scope plumbing work is a violation that can cost you the license and carry penalties. Plumbing protects public health — the exam constantly returns to the two core purposes of the code: deliver safe potable water and remove waste without contaminating that water.

How Iowa licensing works

  • Experience: for experience earned after January 1, 2010, at least four years in a United States Department of Labor registered apprenticeship, unless the statute prints another path you are actually using. This guide does not add an hour total.
  • Exam: Kirkwood's journeyperson plumber with gas paper is 75 questions, 3 hours, open book, and 75 percent or above. The exam fee is 119 dollars, not refundable and not transferable. Books are the 2024 Uniform Plumbing Code and the Iowa State Plumbing Code 2024 amendment booklet.
  • What this guide does not print: a Board application price, a license term, or a continuing-education hour total. The Kirkwood page does not print them.

This is the opening of the full study guide. The complete guide continues into code navigation, worked calculations and solved exam questions.

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Common questions about this exam

How many questions are on the Iowa Journeyman Plumber exam?

The Iowa Journeyman Plumber exam has 75 questions and a time limit of 3 hours, about 2.4 minutes per question. It is open book. The passing score is 75%. Check the current board bulletin before you book.

How much practice does this prep include?

It includes 4 full-length practice exams and 300 practice questions in total. Every question has a written explanation naming the code section the answer comes from.

How long is the study guide?

The Iowa Journeyman Plumber guide runs to roughly 20,236 words in 20 sections, starting with “About the Iowa Journeyman Plumber license” and ending with “Exam-day strategy”.

How long do I get access?

Choose 30, 60 or 90 days at checkout. Your days do not start at checkout: they begin the first time you open the course (or 14 days after purchase, whichever comes first). Access works on any device, and you can retake every practice exam as often as you like. Days remaining are shown in your dashboard and you can extend at any time.

Is this an official Iowa Journeyman Plumber exam?

No. This is independent preparation material. It is not affiliated with or endorsed by any state licensing board or exam vendor, and it does not contain real exam questions. Always confirm current requirements with your licensing board.

About this prep

This prep is built specifically for the Iowa Journeyman Plumber examination and includes a 20,000+-word study guide written for this exam, 4 full-length practice exams and 300 practice questions, each with a written explanation.

How access works

You are paying for access length (30, 60, or 90 days). The study guide and four timed exams are the same on every term. Your days start the first time you open the course, not at checkout (or 14 days after purchase, whichever comes first), and access works on any device for that term.

Not affiliated with or endorsed by any state licensing board or exam vendor. For exam-preparation purposes only.