Current Montana exam answer: the Board's current licensing-exam materials still specify the 2021 UPC, even though Montana adopted the 2024 UPC effective September 26, 2026. The written exam is 100 questions in 3 hours, and the practical uses three virtual diagrams in 2.5 hours. Both portions require 70%.
What Is the Montana Journeyman Plumber Exam?
The Montana Board of Plumbers licenses Journeyman Plumbers statewide. Candidates must receive Board approval, satisfy the experience or apprenticeship requirements, and pass both the written and practical examinations.
The written exam is administered through IAPMO and is currently listed as an open-book, 100-question exam based on the 2021 Uniform Plumbing Code as amended for Montana. The practical examination consists of three virtual plumbing diagrams.
Written exam: 100 questions | 3 hours | 70% passing | open book | 2021 UPC exam reference.
Practical exam: 3 virtual diagrams | 2.5 hours | 70% passing.
Current-code distinction: Montana adopted the 2024 UPC for current code enforcement, but the Board's present licensing-exam materials still specify the 2021 UPC.
This distinction matters. A current-code course based on the 2024 UPC can improve professional knowledge and exam skills, but candidates should still take the exact Board-approved 2021 UPC reference to the exam until Montana officially changes the licensing-exam code year.
Montana Journeyman Plumber Exam and Licensing Focus Areas
The Montana Board does not publish an official scored topic-percentage blueprint in the current materials reviewed for this page, so use these as study areas rather than official question weights.
| Study Area | What to Study | Why It Matters |
|---|---|---|
| UPC Navigation | Definitions, general regulations, tables, notes, exceptions and Montana amendments | Open-book written exam requires fast code lookup |
| Sanitary Drainage | Fixture units, pipe sizing, slope, drainage fittings, cleanouts and developed length | Core journeyman plumbing knowledge |
| Venting | Vent types, sizing, distances, wet venting and system layout | Closely tied to written and diagram skills |
| Water Supply and Distribution | Water sizing, pressure, fixture units, materials, valves and distribution | Major field and code-navigation skill |
| Fixtures and Water Heaters | Fixtures, clearances, installation, water heaters and safety devices | Common UPC application area |
| Traps, Interceptors and Backflow | Trap seals, interceptors, separators, air gaps and cross-connection protection | High-value code application topics |
| Plumbing Math and Pipe Sizing | Pressure, area, volume, slope, offsets, developed length and sizing calculations | Supports written and practical performance |
| Isometric / Virtual Diagrams | System layout, pipe sizing, fixtures, drainage, venting and diagram interpretation | Direct preparation for the practical exam |
Montana Journeyman Plumber Exam Breakdown
Licensing AuthorityMontana Board of Plumbers
Testing ProviderIAPMO
Written Questions100 multiple-choice questions
Written Time3 hours | 180 minutes
Written FormatOpen book
Current Exam UPC2021 Uniform Plumbing Code + Montana amendments
Current Adopted State Code2024 Uniform Plumbing Code effective September 26, 2026
Practical Exam3 virtual diagrams
Practical Time2.5 hours
Passing Score70% on written and practical
Experience5 years | at least 7,500 documented hours or approved qualifying path
Written PaceAbout 1.8 minutes per question
Montana Journeyman Plumber and Plumbing Contractor Career Path
Montana separates the Journeyman Plumber trade license from the authority to run a plumbing business or pull plumbing permits.
Journeyman Plumber: licensed individual who has satisfied experience and exam requirements.
Permit authority: the Montana Board states a Journeyman Plumber cannot obtain plumbing permits or advertise as a plumbing business.
Master Plumber: the license level required for plumbing permit authority and the plumbing-business path.
Career progression: Apprentice → Journeyman Plumber → Master Plumber → plumbing business / permit responsibilities.
Montana Journeyman Plumber Study Priorities
These bars are recommended preparation priorities based on the current UPC exam structure and practical skills. They are not official Montana Board question percentages.
UPC Navigation and General RegulationsHighest Priority
Sanitary DrainageVery High Priority
VentingVery High Priority
Isometric and Virtual Diagram PracticeVery High Priority
Water Supply and DistributionHigh Priority
Plumbing Math and Pipe SizingHigh Priority
Fixtures and Water HeatersHigh Priority
Traps, Interceptors and BackflowHigh Priority
Montana 2021 UPC Exam vs. 2024 UPC Current Code
Keep the licensing-exam reference and the currently adopted Montana code distinct.
| Reference / Rule | Current Status | How to Use It |
|---|---|---|
| 2021 Uniform Plumbing Code | Still specified in the Board's current licensing-exam materials | Primary exam-specific study and test-day reference until the Board changes the exam year |
| Montana 2021 UPC Amendments | Linked with the current Board exam information | State-specific exam preparation |
| 2024 Uniform Plumbing Code | Adopted for Montana plumbing-code enforcement effective September 26, 2026 | Current-code professional education and future-facing study |
| 1 Exam Prep 2024 UPC Course | Current-code training resource | Use for plumbing systems, calculations, isometrics and 2024 UPC education while separately studying the Board's current 2021 UPC exam reference |
Your Montana Journeyman Plumber Licensing Roadmap
Document the experience, receive Board approval, prepare the exact exam reference, pass both examinations and maintain the license.
1
Build qualifying experience
Complete the required five years and at least 7,500 documented hours or another Board-approved qualifying route such as an approved apprenticeship.
2
Submit the Montana Board application
Provide the required application and experience-verification documentation before testing.
3
Receive examination approval
The Board must approve the applicant before scheduling through IAPMO.
4
Prepare the current exam UPC
Use the exact Board-specified exam code year and Montana amendments, currently the 2021 UPC materials.
5
Pass the written exam
Complete 100 open-book questions in three hours and earn at least 70%.
6
Pass the virtual practical
Complete the three virtual diagrams within 2.5 hours and earn at least 70%.
7
Maintain and advance the license
Renew annually, complete required continuing education and build toward Master Plumber licensing if plumbing-business and permit authority are your goal.
Six-Week Montana Journeyman Plumber Exam Prep Plan
Week 1
UPC and Montana Exam Setup
- Confirm the exam code year
- Organize the 2021 UPC and Montana amendments
- Review IAPMO rules
- Take a diagnostic practice exam
Week 2
Drainage and Pipe Sizing
- Fixture units
- Drainage sizing
- Slope and cleanouts
- Developed length
Week 3
Venting and Isometrics
- Vent sizing
- Wet venting
- System layout
- Virtual diagram practice
Week 4
Water, Fixtures and Backflow
- Water supply sizing
- Fixtures and water heaters
- Backflow prevention
- Traps and interceptors
Week 5
Math and Practical Drills
- Pressure calculations
- Offsets and lengths
- Pipe sizing
- Timed virtual diagrams
Week 6
Full Written and Practical Simulation
- 100-question timed practice
- 1.8-minute question pace
- Three-diagram practical rehearsal
- Final weak-area review
Montana Journeyman Plumber Open-Book Exam Prep Strategy
Do this during exam prep
- Use the exact UPC edition assigned to the exam
- Study Montana amendments
- Learn the UPC index and major tables
- Practice 1.8-minute question pacing
- Use only allowed reference-book preparation
- Practice virtual isometric diagrams separately
Avoid these mistakes
- Assuming the newly adopted 2024 UPC is already the licensing-exam book
- Bringing loose notes or inserted papers
- Ignoring the practical exam
- Spending too long on one written lookup
- Relying only on field experience
- Confusing Journeyman licensing with Master Plumber permit authority
Written strategy: 100 questions in 180 minutes averages about 1.8 minutes per question. Answer direct knowledge questions quickly, use targeted UPC keywords for code lookups, and move on before one question eats your clock.
Montana Journeyman Plumber Exam Prep Options
2026 Montana Journeyman Plumber Course
2024 UPC Current-Code Training
- 700+ practice questions
- UPC chapter review
- Plumbing math
- Isometric walkthroughs
- Simulated computer exams
Montana Journeyman Plumber Collection
Exam-Specific Study Resources
- 2021 UPC study resources
- Code navigation
- Plumbing calculations
- Practice-oriented preparation
- Montana licensing guidance
UPC Journeyman Plumber Flash Cards
High-Yield UPC Review
- UPC concepts
- Drainage and venting
- Fixtures and water supply
- Plumbing math
- Repeated recall practice
Journeyman Plumber and Montana Plumbing Contractor Authority Are Different
The Montana Journeyman Plumber license proves trade-level qualification, but the Board says a Journeyman cannot pull plumbing permits or advertise as a plumbing business. The Master Plumber level is the route to permit and business authority.
· Written exam: 100 questions, 3 hours, 70%
· Practical exam: 3 virtual diagrams, 2.5 hours, 70%
· Experience: 5 years and at least 7,500 documented hours or approved path
· Annual renewal date: September 1
· Continuing education: generally 4 code-related hours per license year
Montana Journeyman Plumber Exam Prep FAQ
Montana Written Exam and UPC References
The Montana Board of Plumbers regulates statewide Journeyman Plumber licensing.
The current Montana Board examination information lists 100 multiple-choice questions.
The current Board examination information allows 3 hours, or 180 minutes.
Candidates must earn at least 70 percent on both the written and practical portions.
Yes. The current written examination is open book under the Montana Board and IAPMO testing rules.
The Montana Board's current examination information still specifies the 2021 Uniform Plumbing Code with Montana amendments.
Yes. Montana adopted the 2024 UPC for current plumbing-code enforcement effective September 26, 2026.
Do not assume that. The Board's current exam information still specifies the 2021 UPC. Confirm the exact exam reference in your admission materials before test day.
The Montana Board approves applicants and IAPMO is the current testing provider identified by the Board.
Montana Practical Exam
The current Montana exam information describes a practical examination consisting of three virtual plumbing diagrams.
The current practical examination time limit is 2.5 hours.
The practical portion follows separate exam rules from the written portion. Candidates should use the current Montana Board and IAPMO instructions for allowed materials.
Experience, Contractor Path and Study Strategy
A primary qualification route requires five years of legally obtained plumbing experience totaling at least 7,500 aggregate hours, documented as required by the Board.
Yes. Completion of an approved registered apprenticeship is another recognized qualification path.
The Board requires experience verification through the appropriate affidavit, typically completed by an active licensed master plumber or plumbing contractor.
No. The Montana Board states that a Journeyman Plumber cannot obtain plumbing permits or advertise as a plumbing business. A Master Plumber license is required for permit authority.
No. Journeyman Plumber is an individual trade license. Plumbing business and permit authority are tied to the Master Plumber level.
A common path is Apprentice, then Journeyman Plumber, then Master Plumber, followed by plumbing-business and permit responsibilities permitted at the master level.
With 100 written questions in 180 minutes, the average pace is about 1.8 minutes per question.
Focus on UPC navigation, sanitary drainage, venting, water supply and distribution, fixtures, water heaters, traps, interceptors, backflow, storm drainage, plumbing math, pipe sizing and isometric interpretation.
The current Board materials reviewed for this page do not publish an official scored topic-percentage blueprint. Study-priority bars on this page are preparation guidance, not official exam weights.
The Board's current exam sheet allows the 2021 UPC with factory tabs. IAPMO requires approved references to remain in their original binding and prohibits loose inserted papers.
No. Current IAPMO testing rules prohibit loose notes and inserted papers in the approved exam references.
Current IAPMO Montana testing information permits a simple non-scientific calculator.
Retesting, Reciprocity, Renewal and Continuing Education
The current Board exam information requires 20 hours of continuing education before approval for a fourth written attempt during the one-year life of the application.
The current Montana exam information says an applicant who fails the fourth written examination must wait one year before reapplying.
The Board's current exam information describes a temporary-license option for otherwise eligible candidates who score 65 to 69 percent on the practical exam and are scheduled for the next examination.
Montana currently identifies Journeyman reciprocity arrangements with Idaho, North Dakota, South Dakota and Oregon, subject to Board application and equivalency requirements.
No. The Montana Board states that Master Plumber licenses are not reciprocal.
Montana plumbing licenses expire on September 1 each year and must be renewed annually.
Active licensees generally must complete 4 hours of Board-approved, code-related continuing education each license year, subject to the Board's stated exemptions.
The 2024 UPC course provides current Montana code education, plumbing-system review, calculations, isometrics and practice. Candidates should still prepare with the exact 2021 UPC exam reference until the Board officially changes the examination code year.
1 Exam Prep: Pass the 2026 Journeyman Plumber Exam
Explore Montana Journeyman Plumber Exam Prep Resources
2026 Montana Journeyman Plumber Course Montana Journeyman Plumber Exam Prep Collection UPC Journeyman Plumber Flash Cards Montana Board of Plumbers Montana Journeyman Plumber License Information Montana Plumbing Exam Information Montana 2021 UPC Exam Information Sheet IAPMO Montana Plumbing License Testing Montana Current Building and Plumbing Codes Montana Board of Plumbers FAQ Montana Plumbing Continuing Education Montana Plumbing License and Renewal Information
Ready to Prepare for the Montana Journeyman Plumber Exam?
Build fast UPC navigation, drainage and venting knowledge, water-supply confidence, plumbing-math accuracy, isometric skill, practical-diagram speed and a clear plan for advancing from Journeyman Plumber toward Montana Master Plumber and plumbing-business responsibilities.
Questions? Call 877-775-9400
or email sales@1examprep.com
Montana Journeyman Plumber Exam Prep
- Choosing a selection results in a full page refresh.
- Opens in a new window.