Free CO Plumber Exam Prep
Colorado Journeyman Plumber License Exam (DORA State Plumbing Board / PSI)
Prepare for the CO Plumber exam without spending hundreds on expensive prep courses. Free study guides, practice questions, flashcards, and related exam resources.
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Colorado Plumber License License: Complete Roadmap
Follow this path to organize your licensing and exam preparation
IPC Fundamentals & DrainageYou are here
Master drain sizing, fixture units, slope requirements, cleanouts, and trap seal protection.
Water Supply & Backflow Prevention
Study pipe sizing, pressure regulation, cross-connection control, and water heater requirements.
Venting & Gas Piping
Cover vent sizing, wet venting, AAVs, gas pipe sizing, BTU calculations, and appliance venting.
Materials, Fixtures & Timed Practice
Review approved materials, joint methods, fixture clearances, and complete full timed simulations.
Can You Take the CO Plumber Exam?
Check if you meet the basic eligibility requirements
- •Submit application to the DORA State Plumbing Board
- •Provide documentation of required experience
- •Pay exam fee to PSI
CO Plumber Quick Facts
Time to Get Licensed
6-10 weeks for most candidates
From start to license in hand
Retake Policy
Candidates who fail may reapply through the DORA State Plumbing Board and pay the exam fee again. A waiting period may apply.
Total Cost Breakdown
Free CO Plumber Prep Tools
Reported exam pass rate: Approximately 60%; agency does not publish official pass rate data. These figures describe exam candidates, not OpenExamPrep user outcomes. Check the exam sponsor’s website for published statistics.
100 Practice Questions
IPC-based questions covering all Colorado plumber exam topics with detailed explanations
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Get instant explanations on drainage, venting, water supply, and gas piping questions
2026 Updated
Review current DORA State Plumbing Board requirements and IPC edition
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What You'll Study
18 chapters covering the exam topics in this guide
Chapter 1: Passing the Colorado Journeyworker Plumber Exam
3 sections
Chapter 2: General Regulations (IPC Chapter 3)
4 sections
Chapter 3: Fixtures and Equipment (IPC Chapter 4)
4 sections
Chapter 4: Water Heaters (IPC Chapter 5)
4 sections
Chapter 5: Water Supply Materials and Installation (IPC Chapter 6)
3 sections
Chapter 6: Water Supply Sizing and Pressure (IPC Chapter 6 and Appendix E)
3 sections
Chapter 7: Cross-Connection Control and Backflow Prevention (IPC Sections 608-610, Chapter 13)
4 sections
Chapter 8: Sanitary Drainage Materials and Fittings (IPC Chapter 7)
3 sections
Chapter 9: Sanitary Drainage Sizing (IPC Sections 704, 709-711)
4 sections
Chapter 10: Cleanouts, Sumps and Below-Sewer Drainage (IPC Sections 708, 712-716)
4 sections
Chapter 11: Vent Fundamentals and Terminals (IPC Sections 901-905, 908)
3 sections
Chapter 12: Vent Types and Sizing (IPC Sections 906-911, 917)
4 sections
Chapter 13: Engineered and Special Venting (IPC Sections 912-916, 918-920)
3 sections
Chapter 14: Traps, Interceptors and Separators (IPC Chapter 10)
3 sections
Chapter 15: Indirect and Special Waste (IPC Chapter 8)
3 sections
Chapter 16: Storm Drainage (IPC Chapter 11 and Appendix B)
6 sections
Chapter 17: Residential Fire Sprinklers (IRC Section P2904)
1 sections
Chapter 18: Isometric Analysis and Plumbing Calculations
3 sections
CO Plumber Exam Details
Colorado Journeyman Plumber License Exam (DORA State Plumbing Board / PSI)
Administered by DORA State Plumbing Board
What's Included
18 Chapters
Complete exam coverage
Practice Quizzes
With detailed explanations
Free to Start
No credit card required
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