Free WA Plumber Exam Prep
Washington Journeyman Plumber License Exam
Prepare for the WA Plumber exam without spending hundreds on expensive prep courses. Free study guides, practice questions, flashcards, and related exam resources.
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Washington Plumber License License: Complete Roadmap
Follow this path to organize your licensing and exam preparation
UPC Fundamentals & DrainageYou are here
Study UPC Chapters 1-4 and 7 with Washington amendments: permits and tests, fixtures, DFU values, and Table 703.2 drain sizing from memory
Water Supply & Backflow
Master UPC Chapter 6: Tables 610.3, 610.4, and 610.10 water sizing, pressure limits, and Washington backflow amendments and DOH testing rules
Vents, Traps & Indirect Wastes
Master UPC Chapters 8-10: vent sizing with the half-drain and aggregate venting rules, wet and circuit venting, trap arm limits, and interceptors
WA Amendments & Drawing Practice
Review WAC 51-56 amendments and work timed Part 2 waste and vent and Part 3 water sizing drawing exercises
Can You Take the WA Plumber Exam?
Check if you meet the basic eligibility requirements
- •Submit the L&I plumber exam application with the $202.10 non-refundable fee
- •Schedule with PSI and pay the $84 three-portion exam fee
- •Closed-book exam: Tables 702.1, 610.3, 610.4, and 610.10 are provided; Table 703.2 is not
- •Pay the $242.70 journey level certificate fee within 90 days of passing
WA Plumber Quick Facts
Time to Get Licensed
10-14 weeks for most candidates
From start to license in hand
Retake Policy
After a failed attempt, submit a new L&I application with the $202.10 fee and wait 14 days from the last failed test. PSI charges $84 for the three-portion exam and $52 per individual portion on a retest. Candidates must pass all three portions; L&I decides whether any passed portion is waived. Unlimited attempts are allowed during the one-year eligibility period.
Total Cost Breakdown
Free WA Plumber Prep Tools
Reported exam pass rate: Not published. These figures describe exam candidates, not OpenExamPrep user outcomes. Check the exam sponsor’s website for published statistics.
100 Practice Questions
Washington-specific questions covering UPC 2015, DWV sizing, venting, and WA amendments
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What You'll Study
14 chapters covering the exam topics in this guide
Chapter 1: Administration, Licensing, & General Regulations
4 sections
Chapter 2: Plumbing Fixtures, Fittings, & Clearances
4 sections
Chapter 3: Water Heaters & Storage Tanks
4 sections
Chapter 4: Water Supply and Distribution Systems
4 sections
Chapter 5: Backflow Prevention & Cross-Connection Control
4 sections
Chapter 6: Sanitary Drainage Systems & Sizing
4 sections
Chapter 7: Cleanouts, Sumps and Ejectors, Indirect Wastes, & Interceptors
4 sections
Chapter 8: Vents and Venting Fundamentals
4 sections
Chapter 9: Vent Terminations, Traps, & Priming
3 sections
Chapter 10: Alternate Water, Rainwater Catchment, Definitions, & Referenced Standards
3 sections
Chapter 11: Part 2 — Waste & Vent Isometric Drawings & Plan Analysis
4 sections
Chapter 12: Part 3 — Water Supply Isometric Drawings & Pipe Sizing
4 sections
Chapter 13: Washington Amendments Review, Plumbing Math, & Water Service Special Topics
3 sections
Chapter 14: Comprehensive Exam Preparation & Test-Taking Strategy
3 sections
WA Plumber Exam Details
Washington Journeyman Plumber License Exam
Administered by Washington Department of Labor & Industries (L&I)
What's Included
14 Chapters
Complete exam coverage
Practice Quizzes
With detailed explanations
Free to Start
No credit card required
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