Colorado Journeyman Plumber Exam Prep

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Colorado Journeyman Plumber exam at a glance

The Colorado Journeyman Plumber exam has 100 questions and a time limit of 4 hours. That works out to about 2.4 minutes per question. Figures are from the official candidate bulletin, checked October 8, 2026.

Questions100
Time4 hours

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: PSI Colorado Plumbing CIB updated 9/3/2026 (Journeyworker Plumber); bulletin 3402, checked October 8, 2026. How we source exam facts

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What’s included

18,000+ 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.

400 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 Colorado Journeyman Plumber license
  2. How Colorado 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 find in a clean book
  18. Glossary of must-know terms
  19. Your 30 / 60 / 90 day study plan
  20. Exam-day strategy

Colorado Journeyman Plumber licensing, explained

About the Colorado Journeyman Plumber license

Colorado licenses plumbers through the Colorado State Plumbing Board, within the Department of Regulatory Agencies (DORA) Division of Professions and Occupations. There is no separate apprentice license — apprentices register with DORA and must work under the direct supervision of a licensed residential, journeyman, or master plumber. You earn the Journeyman Plumber license by documenting 4 years (6,800 hours) of practical plumbing experience, verified by an Affidavit of Experience from your employer(s), and passing the trade exam.

Colorado is an IPC state, not a UPC state: your exam is built on the 2021 International Plumbing Code (IPC) and the 2021 International Residential Code (IRC) for one- and two-family dwellings, per PSI's current Colorado candidate bulletin. The exam is written to that base ICC text, not to Colorado's state amendments in the Colorado Plumbing Code (3 CCR 720-1) — so a locally amended value you know from the field may not match the tested answer. The bulletin read on October 8, 2026 already names those 2021 editions through October 31, 2026.

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 Colorado licensing works

  • Experience: 4 years (6,800 hours) of documented practical plumbing experience, verified by an Affidavit of Experience from your employer(s); the master license requires additional experience as a licensed journeyman on top of that.
  • Apprentices: no separate apprentice license — register with DORA within 30 days of starting plumbing work and work only under a licensed residential, journeyman, or master plumber.
  • Application: submit the application, fees, and proof of experience before you are approved to sit for the exam.
  • Exam: PSI administers the Journeyman exam as 100 scored questions in 240 minutes (plus up to 10 unscored pretest questions and 30 extra minutes), with a passing score of 70 percent (70 of 100). The heaviest-weighted content areas are sanitary drainage (20 questions) and venting (18) — that bulletin prints 100 scored items, 240 minutes, and 70 percent, and the fee is $78.
  • Renewal: licenses renew on a two-year cycle and require 8 hours of continuing education each year of the cycle (16 hours total), including at least 4 code-related hours every 24 months. If you were just licensed by exam, CE isn't required until your first renewal.

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 Colorado Journeyman Plumber exam?

The Colorado Journeyman Plumber exam has 100 questions and a time limit of 4 hours, about 2.4 minutes per question. Check the current board bulletin before you book.

How much practice does this prep include?

It includes 4 full-length practice exams and 400 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 Colorado Journeyman Plumber guide runs to roughly 18,504 words in 20 sections, starting with “About the Colorado 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 Colorado 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 Colorado Journeyman Plumber examination and includes a 18,000+-word study guide written for this exam, 4 full-length practice exams and 400 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.