Maine Plumbers' Examining Board • PROV • 80 Questions • 180 Minutes • 70% to Pass • Closed Book
Ready to become a licensed Journeyman Plumber in Maine? This Maine Journeyman Plumber Contractor Exam Prep guide explains the state's plumbing licensing requirements, the official PROV examination, Maine Uniform Plumbing Code rules, plumbing calculations, study books, and exam preparation resources from Contractor Exam Preps.
Maine officially licenses Journeyman Plumbers through the Plumbers' Examining Board.
The Board operates within Maine's Office of Professional and Occupational Regulation, commonly called OPOR.
This is an individual plumbing trade license, not a separate unrestricted plumbing contracting business license.
Under Maine's licensing definition, a Journeyman Plumber customarily installs plumbing and drainage systems while working under the employment and direction of a licensed Master Plumber.
The definition also recognizes certain plumbing repair work performed as a regular part-time occupation by someone who is not a Master Plumber.
Plumbers install and repair systems that provide potable water and safely remove wastewater.
Their work can include water supply pipes, fixtures, traps, drains, sanitary vents, sewers, water heaters, backflow protection, and related equipment.
When these systems work correctly, people barely notice them.
When they do not, a simple morning routine can quickly become a very expensive indoor swimming lesson.
Maine requires qualifying plumbing experience before an applicant can obtain the Journeyman Plumber license.
The standard trainee pathway involves at least two years and 4,000 hours of supervised plumbing installation experience as a licensed Trainee Plumber.
That work must be completed under the supervision of a licensed Master Plumber.
An alternative pathway is available to qualifying Journeymen-in-Training.
That pathway requires 2,000 hours of plumbing installation work under the supervision of a licensed Master Plumber.
The experience must be completed within four years of receiving the Journeyman-in-Training license.
Maine's Journeyman-in-Training classification has its own education and examination requirements.
Applicants using that route should confirm that they have met all applicable conditions before applying for the full Journeyman license.
Once qualified, applicants must receive Board approval before scheduling the licensing examination.
This approval comes before registering with the testing provider.
Maine's current examination provider is PROV, Inc..
The official January 2026 PROV Candidate Information Bulletin identifies the Journeyman Plumber examination as an 80-question exam.
Candidates have three hours, or 180 minutes, to complete it.
The required passing score is 70%.
For an 80-question scored examination, that means at least 56 correct answers.
The most important testing rule is that the Maine Journeyman Plumber examination is closed book.
Candidates cannot bring their plumbing codebook or personal study notes into the exam to look up answers.
This is different from many other state plumbing examinations.
Some plumbing exams allow books and permanent reference tabs.
Maine does not allow that approach for its Journeyman Plumber examination.
Students should use plumbing reference books for learning at home and then practice recalling the correct answers without those books.
The official PROV examination blueprint contains nine subject areas.
Drainage, Waste and Sanitary Venting is the largest category, with 18 questions.
Water Supply Systems, Including Backflow Prevention and Water Heaters comes next with 16 questions.
General Knowledge includes 15 questions.
General Regulations accounts for 10 questions.
Plumbing Fixtures, Traps and Interceptors, and Roof Drainage each contain five questions.
Specialty Venting and Indirect Waste each contain three questions.
Together, these categories total 80 questions.
The exam covers much more than connecting pipes.
Candidates need to understand why plumbing systems are designed the way they are and which installation requirements apply.
For example, water distribution piping must be properly sized for expected demand.
Backflow prevention protects potable water from contamination.
Drainage pipes need proper sizing, slope, and arrangement.
Vents help drainage systems maintain proper pressure conditions and protect trap seals.
Traps help prevent sewer gases from entering occupied spaces.
Water heaters require suitable installation and safety protection.
Fixture requirements may change depending on the type of building and installation.
All of these concepts can appear in exam questions.
Students should also understand Maine plumbing regulations and the adopted construction code.
Maine currently uses the 2021 Uniform Plumbing Code, with Maine-specific amendments, as the basis of its internal plumbing installation standards.
The 2021 UPC took effect in Maine on January 1, 2022.
However, the current PROV Journeyman Plumber Candidate Information Bulletin still lists the 2015 Uniform Plumbing Code among its examination study references.
It also lists Maine Plumbing Laws and Rules, Maine Plumbing Tables based on the 2015 UPC, and Plumbing Basics for Contractors, Third Edition.
This creates an important study distinction.
The 2021 UPC is the state's adopted installation code.
The 2015 UPC remains the edition identified in the published PROV examination study reference list.
Because the exam is closed book, neither edition can be used as a personal reference during testing.
Students should understand the current 2021 Maine code for professional work while reviewing the published 2015-based examination references for test preparation.
Do not assume that the International Plumbing Code and Uniform Plumbing Code are interchangeable.
Maine follows the UPC family of plumbing codes.
That means UPC-based products are a closer educational match than study packages written specifically for the International Plumbing Code.
Contractor Exam Preps offers the Journeyman Plumber Exam Study Guide Based on the 2021 Uniform Plumbing Code.
This printed study guide includes 990 practice questions with answer keys, plumbing math, isometric drawing review, OSHA topics, and test-taking guidance.
The store also offers the Journeyman Plumber Test Success Online Course Based on the 2021 UPC.
That course provides structured plumbing instruction and simulated computer-based practice exams.
Both products are related to the UPC code family used in Maine.
However, their 2021 code basis is not the same as the 2015 UPC reference edition listed in the current PROV examination bulletin.
They should be used as supplemental preparation rather than treated as an official Maine examination guide.
The store also has a general Maine Contractor Exam Prep resource page that introduces the Journeyman Plumber licensing path.
After passing the examination, candidates complete the state licensing application process.
The Board explains that successful applicants may generally use the online licensing system 24 hours after passing the exam.
The currently listed Journeyman Plumber license fee is $200, with a separate $21 criminal background-check fee.
Maine Journeyman Plumber licenses renew every two years, with a listed $200 biennial renewal fee.
Licensure is not automatic merely because a person has passed the examination.
The Board must also confirm that the applicant satisfies the applicable experience and other licensing conditions.
This complete guide covers Maine Journeyman Plumber requirements, PROV exam specifications, the nine official content categories, code-edition differences, plumbing calculations, study methods, a six-week plan, relevant Contractor Exam Preps products, credential artwork, interactive FAQs, and a related 1ExamPrep video.
Important Maine Journeyman Plumber 2026 Update: The official Maine PROV bulletin dated January 6, 2026, lists 80 examination questions, a three-hour limit, and closed-book testing. Maine requires 70% correct to pass, which equals 56 correct answers. The Board must approve an applicant before PROV scheduling. Maine's current adopted plumbing installation code is the 2021 Uniform Plumbing Code with state amendments, but the PROV examination study-reference list still identifies the 2015 UPC. The listed references are for preparation only because personal books are not permitted during the test. The current PROV Journeyman Plumber exam fee is $65. Verify the latest Board and PROV instructions before registering.
A Maine Journeyman Plumber is a licensed plumbing tradesperson who has completed the state's qualifying experience requirements and examination process.
The credential is regulated by the Maine Plumbers' Examining Board.
The state's definition generally describes a journeyman as someone who installs plumbing and drainage while working under the employment and direction of a Master Plumber.
Plumbing work can involve water distribution, fixtures, traps, sanitary drains, vents, building sewers, water heaters, and related systems.
These systems protect public health and support daily building operations.
A plumbing installation must deliver safe drinking water and remove waste without creating unsafe conditions.
Water supply pipes need correct sizing and suitable materials.
Backflow protection is important because contaminated water must not enter the potable water system.
Drainage pipes need appropriate sizing and slope.
Vents help maintain proper drainage-system operation.
Traps maintain a seal that helps prevent sewer gas from entering buildings.
Water heaters require suitable protection and installation.
Plumbing fixtures and fittings must meet applicable code provisions.
A Journeyman Plumber should understand how those components work together.
Real-world plumbing projects also require mathematical knowledge.
For example, a plumber may calculate pipe offsets or estimate the length of a developed piping run.
Other calculations involve fixture units, pipe sizes, water pressure, drainage slope, and roof drainage.
A practical plumber might know how to install a drainage branch, but an examination may ask why one configuration is permitted while another is not.
That is why code knowledge matters.
Idaho, Indiana, Hawaii, and Maine may all have plumbing examinations, but their testing formats and code references are not identical.
Maine's examination is administered by PROV and is closed book.
Students should prepare specifically for Maine rather than relying on another state's practice exam rules.
License: Maine Journeyman Plumber.
Regulator: Maine Plumbers' Examining Board.
Agency: Office of Professional and Occupational Regulation.
Testing provider: PROV, Inc.
Code used for current installations: 2021 UPC with Maine amendments.
License type: Individual plumbing trade credential.
Review the Maine Plumbers' Examining Board for current state licensing information.
| Step | Requirement | What to Prepare |
|---|---|---|
| Choose License | Journeyman Plumber | Confirm the individual license classification. |
| Identify Board | Maine Plumbers' Examining Board | Review current license eligibility rules. |
| Standard Route | Licensed Trainee Plumber | Complete qualifying supervised work. |
| Standard Experience | 4,000 Hours | Document plumbing installation work. |
| Standard Experience Duration | At Least Two Years | Meet both time and hour requirements. |
| Supervisor | Licensed Master Plumber | Obtain appropriate verification. |
| Alternative Route | Journeyman-in-Training | Meet the separate education and license requirements. |
| Alternative Work Hours | 2,000 Hours | Document supervised installation experience. |
| Alternative Time Window | Within Four Years | Complete work within four years of JIT license issuance. |
| JIT License Term | Four Years | Understand the nonrenewable license period. |
| Board Exam Application | Required | Apply for permission to take the examination. |
| Board Approval | Before Scheduling | Wait for examination eligibility approval. |
| Exam Provider | PROV | Schedule after receiving Board authorization. |
| Exam Questions | 80 | Study the nine official categories. |
| Exam Time | 180 Minutes | Practice under three-hour conditions. |
| Passing Standard | 70% | Answer at least 56 questions correctly. |
| Testing Format | Closed Book | Memorize code rules and system concepts. |
| Exam Fee | $65 Listed | Confirm the PROV fee before payment. |
| Testing Options | Center or Approved Remote Proctoring | Review equipment and identification requirements. |
| State License Application | After Passing | Submit state application and qualifying documents. |
| License Fee | $200 Listed | Budget for the individual license. |
| Background Check | $21 Listed | Confirm current background-check charge. |
| Renewal | Every Two Years | Maintain the credential through OPOR. |
| Renewal Fee | $200 Listed | Confirm the current biennial charge. |
| Master Advancement | Separate Qualification | Review Master Plumber experience and exam requirements. |
| Exam Detail | Authority | Current Information |
|---|---|---|
| Official Examination | PROV | Journeyman Plumber |
| Licensing State | Maine | Statewide Individual License |
| Board | OPOR | Maine Plumbers' Examining Board |
| Exam Administrator | PROV | PROV, Inc. |
| Question Count | PROV | 80 |
| Time Allowed | PROV | 3 Hours |
| Time in Minutes | PROV | 180 |
| Passing Score | Maine Board | 70% |
| Minimum Correct | Calculated | 56 of 80 |
| Exam Format | PROV | Computer-Based |
| Open Book | PROV | No |
| Board Approval | Maine Board | Required Before Scheduling |
| Examination Fee | PROV | $65 Listed |
| General Knowledge | Blueprint | 15 Questions |
| General Regulations | Blueprint | 10 Questions |
| Water Supply, Backflow and Water Heaters | Blueprint | 16 Questions |
| Drainage, Waste and Sanitary Venting | Blueprint | 18 Questions |
| Plumbing Fixtures | Blueprint | 5 Questions |
| Traps and Interceptors | Blueprint | 5 Questions |
| Specialty Venting | Blueprint | 3 Questions |
| Indirect Waste | Blueprint | 3 Questions |
| Roof Drainage | Blueprint | 5 Questions |
| Total Categories | Blueprint | Nine |
| Exam Study Reference | PROV | Maine Plumbing Laws and Rules, 2016 |
| Exam Study Reference | PROV | Maine Plumbing Tables, 2015 UPC |
| Exam Study Reference | PROV | Plumbing Basics for Contractors, 3rd Edition |
| Exam Study Reference | PROV | Uniform Plumbing Code, 2015 |
| Current Maine Installation Code | State | 2021 UPC with Maine Amendments |
| Retail UPC Study Guide | Contractor Exam Preps | 2021 UPC Based |
| Retail UPC Online Course | Contractor Exam Preps | 2021 UPC Based |
| Standard Trainee Experience | State | 4,000 Hours in at Least 2 Years |
| JIT Experience | State | 2,000 Hours Within Required Four-Year Window |
| License Fee | OPOR | $200 Listed |
| Background Check Fee | OPOR | $21 Listed |
| Renewal Frequency | OPOR | Every Two Years |
| Renewal Fee | OPOR | $200 Listed |
| Approved Exam Locations | PROV | Testing Centers and Eligible Remote Testing |
| Exam Results | PROV | Usually Available After Completing the Examination |
Maine's January 2026 PROV Journeyman Plumber examination contains nine subject categories totaling 80 questions.
Study plumbing terminology, piping materials, common installation procedures, measurements, tools, fittings, plumbing mathematics, and basic system principles.
Understand how water supply and drainage systems work together.
Review the purpose of plumbing fittings, cleanouts, traps, vents, valves, and fixtures.
Review Maine plumbing licensing requirements, definitions, applicable plumbing rules, inspections, permits, and general installation standards.
Understand why local requirements and Maine amendments must be considered alongside the adopted UPC.
Study potable water service and distribution, water pressure, demand, sizing, valves, backflow devices, cross-connection control, and water heaters.
Review water heater safety requirements and temperature-and-pressure protection concepts.
Learn the reasons backflow protection is required.
This is the largest category in the examination.
Study drainage pipe sizing, drainage fixture units, slope, cleanouts, building drains, building sewers, and sanitary vent systems.
Learn the differences among waste, soil, drain, and vent piping.
Practice identifying proper drainage and vent arrangements.
Study common plumbing fixtures, installation methods, fixture fittings, connections, clearances, and related code concepts.
Review fixture traps, trap seals, cleanouts, interceptors, and their roles in protecting drainage-system operation.
Study specialized venting arrangements and the installation conditions that determine when those methods are allowed.
Review indirect waste piping, receptors, air gaps, air breaks, and the purpose of separating selected equipment drains from the sanitary system.
Study storm drainage, roof drains, rainwater leaders, drainage area, and basic stormwater sizing principles.
Largest category: Drainage, Waste and Sanitary Venting, 18 questions.
Second-largest: Water Supply, Backflow Prevention and Water Heaters, 16 questions.
Third-largest: General Knowledge, 15 questions.
Top three combined: 49 of 80 questions.
Official total: 80 questions.
The best study plan begins with the official PROV examination outline.
There are 80 questions across nine categories.
Drainage, Waste and Sanitary Venting is the largest section.
Water Supply, Backflow Prevention and Water Heaters is the second-largest.
General Knowledge is third.
These three subjects account for 49 of the 80 exam questions.
Give them regular attention while still reviewing all other categories.
Begin by studying plumbing terminology and materials.
Understand the basic purpose of each plumbing system component.
Next, study drainage and venting.
Review drainage fixture units, pipe sizing, cleanouts, slope, and vent arrangements.
Practice looking at a simple plumbing diagram and identifying the sanitary drain, trap, vent, and water supply lines.
Then focus on potable water systems.
Review water supply and distribution, fixture demand, pressure, valves, backflow protection, and water heater safety.
Learn the differences between a cross-connection, backflow, and back-siphonage.
Study traps, interceptors, specialty venting, and indirect waste as separate subjects.
Some questions may describe similar-looking systems that have different code requirements.
The exam also includes five roof-drainage questions.
Review stormwater drainage and basic roof drainage sizing concepts.
Water Supply: Pipe sizing, water pressure, demand, valves, and backflow prevention.
Water Heaters: Installation and safety protection.
Drainage: Soil and waste piping, slopes, cleanouts, and fixture units.
Venting: Vent sizing, trap-seal protection, and system arrangements.
Fixtures: Toilets, lavatories, sinks, showers, and fixture fittings.
Special Systems: Indirect waste, interceptors, specialty vents, and roof drainage.
General Regulations: Maine plumbing laws, permits, and installation standards.
Use the 2021 UPC to understand Maine's adopted plumbing installation code.
Compare examination-specific practice with the PROV bulletin's listed 2015 UPC study references.
Since the exam is closed book, review the material first and then complete practice questions without using the codebook.
After each practice session, return to your study references to understand incorrect answers.
The 2021 UPC Journeyman Plumber Study Guide offers 990 questions with answer keys.
The 2021 UPC Test Success Online Course adds structured online review and exam practice.
These are general UPC-based educational products rather than official Maine Board examinations.
A basic plumbing diagram helps explain how water supply, fixtures, traps, vents, and drainage components work together.
Simplified educational diagram only. Not a code-compliant installation plan or approved plumbing drawing.
Review the Maine Journeyman Plumber license rather than the separate Master Plumber examination.
Complete at least two years and 4,000 hours as a supervised licensed Trainee Plumber or qualify through the Journeyman-in-Training route.
Maintain work-hour records and obtain the required supervising Master Plumber verification.
Apply to the Plumbers' Examining Board and wait for authorization before scheduling with PROV.
Study general plumbing knowledge, regulations, water systems, drainage, vents, fixtures, traps, indirect waste, and roof drainage.
Complete 80-question practice sets using a three-hour timer, without codebooks or study notes.
Answer at least 56 of the 80 scored questions correctly to reach the 70% passing requirement.
Complete the OPOR licensing process and follow the current biennial renewal requirements.
These question counts and percentages follow the published PROV Journeyman Plumber examination outline.
Total: 80 questions and 100%.
Largest three subjects: 49 questions combined, or 61.25%.
Passing requirement: 56 correct answers.
Study strategy: Give extra practice time to the largest categories while reviewing every topic.
Maine students should understand the distinction between current installation requirements, PROV examination study references, and retail educational products.
| Reference or Study Material | Edition | Purpose |
|---|---|---|
| Maine Adopted Plumbing Installation Code | 2021 UPC | Current state standard for plumbing installations, subject to Maine amendments. |
| Maine Chapter 4 Installation Standards | Current State Rules | Maine amendments and exclusions to the adopted UPC. |
| Uniform Plumbing Code | 2015 | Edition listed in PROV's current examination study references. |
| Maine Plumbing Tables | 2015 UPC Based | Exam study reference; the bulletin describes proctor-provided tables. |
| Maine Plumbing Laws and Rules | 2016 in Bulletin | Exam study reference for Maine licensing and regulations. Consult current laws separately. |
| Plumbing Basics for Contractors | 3rd Edition, 2014 | General plumbing trade knowledge; listed by PROV. |
| Journeyman Plumber UPC Study Guide | 2021 UPC | Supplemental Contractor Exam Preps practice, including 990 questions. |
| Journeyman Plumber Test Success Online Course | 2021 UPC | Supplemental video instruction and simulated examinations. |
| Plumbing Mathematics | General Training | Pipe offsets, measuring, slopes, sizes, areas, and volumes. |
| Isometric Plumbing Drawings | General Training | Visual review of supply, drainage, and venting systems. |
| PROV Candidate Information Bulletin | January 2026 | Controlling testing format, questions, time, topics, and test-day procedures. |
2021 UPC: Maine's adopted plumbing installation code.
2015 UPC: Edition identified in the current PROV Journeyman examination study-reference list.
2021 UPC Contractor Exam Preps products: Useful supplemental educational resources.
Closed-book requirement: No personal plumbing codebooks during testing.
Do not substitute IPC: Maine's plumbing code is based on the UPC, not the International Plumbing Code.
Maine's Journeyman Plumber examination is closed book.
You cannot depend on flipping through a plumbing codebook during the test.
The most useful preparation combines studying, recall practice, plumbing diagrams, and timed questions.
Journeyman exam: 80 questions.
Time: 180 minutes.
Passing score: 70%, or 56 correct answers.
Master exam: Different classification with different testing requirements.
Maine Journeyman Plumbers work with systems that supply potable water and safely remove wastewater.
The state's definition generally places journeyman plumbing installation work under the employment and direction of a Master Plumber.
Work can involve water supply and distribution piping, fixtures, traps, vents, building drains, sewers, and domestic water heating equipment.
Journeyman plumbers may be involved in residential and commercial projects within their permitted scope.
They should understand the current Maine plumbing code and the installation requirements applicable to their work.
The 2021 Uniform Plumbing Code provides the foundation for current Maine internal plumbing installation standards.
State amendments can change how particular requirements apply.
Some municipalities may also have additional applicable requirements.
Journeyman plumbers should understand common installation and maintenance tasks.
These can include setting fixtures, connecting piping, installing drains and vents, working with valves, and identifying plumbing problems.
Plumbing safety is important.
Incorrect backflow protection can create a serious potable water contamination risk.
Improperly vented drainage may affect trap seals and drainage performance.
Poorly selected pipe sizes may create pressure or drainage problems.
Incorrect water heater safety installations can create additional hazards.
These concerns explain why Maine requires examination and experience qualifications.
The Journeyman license is not the same as the Master Plumber credential.
In Maine, the Master Plumber classification is the higher-level license associated with engaging in the business of installing plumbing systems.
A Journeyman Plumber who wants to operate at that level must satisfy separate Master licensing rules.
Journeyman: Licensed individual plumbing worker operating within the state's defined scope.
Master: Separate higher-level plumbing license.
Business authority: Do not assume the Journeyman credential grants every Master Plumber business permission.
| Classification | License Type | Main Difference |
|---|---|---|
| Trainee Plumber | Entry-Level Individual License | Assists with plumbing work under the required supervision. |
| Journeyman-in-Training | Training License | Available after approved education and passing the Journeyman exam; requires supervised work. |
| Journeyman Plumber | Individual Trade License | Meets qualifying experience and licensing examination standards. |
| Master Plumber | Advanced Individual/Business Qualification | Separate higher-level licensing requirements and responsibilities. |
| Trainee Route to Journeyman | Experience | At least 2 years and 4,000 supervised installation hours. |
| JIT Route to Journeyman | Experience | 2,000 qualifying supervised hours within the required four-year window. |
| JIT License Term | Four Years | Nonrenewable classification. |
| Journeyman Exam | PROV | 80 questions, 180 minutes, 70% passing. |
| Master Exam | PROV | 100 questions, 180 minutes, 75% passing. |
| Both Plumbing Exams | PROV | Closed book. |
| Journeyman Renewal | OPOR | Every two years. |
| Master Advancement | Separate Eligibility | Review the qualifying experience and examination requirements. |
Two Years and 4,000 Hours
2,000 Supervised Hours
80 Questions, Three Hours
This plan follows the nine subjects in Maine's official PROV Journeyman Plumber outline.
The Maine Journeyman Plumber examination can be challenging because it tests many different plumbing subjects under timed, closed-book conditions.
The examination contains 80 questions.
Candidates have three hours and must answer at least 56 correctly.
That leaves some room for mistakes, but it does not leave room to ignore major subjects.
The largest category is Drainage, Waste and Sanitary Venting.
It accounts for 18 questions.
Water Supply Systems, Backflow Prevention and Water Heaters accounts for another 16 questions.
General Knowledge contributes 15.
Those three categories alone represent more than 60% of the exam.
Students should understand how these systems work in real buildings.
A water supply question might describe a fixture demand or backflow condition.
A drainage question might involve the correct arrangement of waste piping and vents.
Another question might ask about a plumbing fixture, trap, or interceptor.
Some exam questions may require careful reading rather than complicated mathematics.
Others may involve a plumbing drawing or sizing concept.
The closed-book format is especially important.
Students cannot use their UPC book to look up every unfamiliar rule.
That makes repeated practice and understanding of concepts more useful than memorizing isolated answers.
Another challenge involves Maine's code editions.
Maine's adopted installation code uses the 2021 UPC.
However, the PROV examination study references still list the 2015 UPC.
Students must understand that these references serve different purposes.
For professional installations, follow Maine's currently adopted plumbing code and amendments.
For examination preparation, review the current PROV outline and reference list.
The Journeyman Plumber UPC Study Guide from Contractor Exam Preps provides additional practice questions.
The Journeyman Plumber Online Course provides another way to review plumbing concepts.
These resources help organize study, but they should not be confused with official examination material.
A successful study plan combines correct subject priorities, plumbing code understanding, mathematics, and realistic closed-book practice.
Contractor Exam Preps offers general UPC-based Journeyman Plumber study materials that are relevant to Maine plumbing concepts.
The currently verified product listings below are based on the 2021 UPC. They are not separately labeled as official Maine PROV examination packages.
Printed Study Guide and 990 Practice Questions
Online Plumbing Instruction and Practice
Maine-Focused Licensing Overview
Official Maine exam: PROV, closed book, 80 questions, 180 minutes.
Exam study-reference UPC: 2015 edition listed in the current PROV bulletin.
Current Maine installation code: 2021 UPC with amendments.
Store's general study products: 2021 UPC based.
Important: Do not substitute a 2021 IPC study package for a UPC-based Maine plumbing preparation plan.
Actual UPC Journeyman Plumber study-guide image hosted by ContractorExamPreps.com. The custom Maine credential illustration is not a state-issued license.
This educational credential shows the Maine state silhouette, a water droplet, plumbing pipes, a valve, and the Maine Journeyman Plumber examination theme.
It is an exam-preparation illustration, not an official licensing certificate.
The accompanying product photo comes directly from the Contractor Exam Preps UPC Journeyman Plumber Study Guide listing.
• Maine Journeyman Plumber
• Maine Plumbers' Examining Board
• Maine OPOR
• PROV Examination
• 80 Scored Questions
• 180 Minutes
• 70% Passing Score
• 56 Correct Answers to Pass
• Closed-Book Testing
• Board Examination Approval
• 2021 Maine Uniform Plumbing Code
• Maine UPC Amendments
• 2015 UPC Exam Study Reference
• General Plumbing Knowledge
• Maine Plumbing Regulations
• Plumbing Pipe Materials
• Plumbing Fixtures
• Plumbing Fittings
• Potable Water Systems
• Water Distribution
• Water Pressure
• Backflow Prevention
• Cross-Connection Control
• Water Heater Protection
• Drainage and Waste
• Sanitary Plumbing Vents
• Traps and Interceptors
• Cleanouts
• Indirect Waste
• Specialty Venting
• Roof Drainage
• Stormwater Leaders
• Pipe Sizing
• Fixture Units
• Plumbing Mathematics
• Isometric Drawings
• Plumbing Installation Safety
• PROV Practice Examinations
• Licensed Trainee Pathway
• 4,000-Hour Experience Route
• Journeyman-in-Training Pathway
• 2,000-Hour Experience Route
• Master Plumber Supervision
• Biennial License Renewal
• Master Plumber Career Advancement
Build plumbing code knowledge and closed-book examination skills using UPC-based study guides, calculations, diagrams, and timed practice.
Maine Journeyman Plumber Licensing
The Maine Plumbers' Examining Board through the Office of Professional and Occupational Regulation.
Yes. Maine has an official Journeyman Plumber individual licensing classification.
The standard trainee pathway requires at least 4,000 hours over two years. The qualified Journeyman-in-Training pathway requires 2,000 supervised hours within its licensing window.
A licensed Master Plumber must provide the required supervision for the qualifying pathways identified by the Board.
At least two years, with a minimum of 4,000 qualifying installation hours under the required supervision.
It is a separate individual plumbing license for qualifying candidates who meet approved plumbing education and examination requirements and continue supervised work.
Maine lists a four-year nonrenewable Journeyman-in-Training license.
Yes, if all Board conditions are satisfied, including qualifying supervision, appropriate experience verification, and the required four-year experience window.
Official Maine PROV Examination
PROV, Inc. is Maine's current plumbing licensing examination provider.
No. The Maine Plumbers' Examining Board currently contracts with PROV for plumbing licensing examinations.
The current PROV bulletin lists 80 questions.
Three hours, or 180 minutes.
70%, which equals at least 56 correct answers out of 80.
No. All Maine plumber examinations listed in the current PROV bulletin are closed book.
Yes. The Plumbers' Examining Board must approve the examination application before a candidate registers with PROV.
The January 2026 PROV bulletin lists $65 for the Journeyman Plumber examination.
PROV offers remote-proctored examination options for eligible candidates with suitable equipment, subject to current scheduling and technical requirements.
PROV offers testing centers in Maine. The current Board website also lists locations including Auburn, Bangor, Portland, and Presque Isle. Confirm the live scheduling system because locations can change.
After meeting the licensing requirements, you can generally apply through Maine's online licensing system 24 hours after passing.
Maine Plumbing Code and References
Maine uses the Uniform Plumbing Code family of standards for its internal plumbing installation code.
Maine currently identifies the 2021 Uniform Plumbing Code with state amendments as its adopted plumbing installation standard.
The current PROV Journeyman examination study-reference list still names the 2015 UPC, even though Maine's current adopted installation code is the 2021 UPC. The exam remains closed book.
No. The Maine Journeyman Plumber examination is closed book. Personal UPC books are for study before testing.
Yes. Maine's Chapter 4 Installation Standards adopts the 2021 UPC with state-specific exclusions and amendments.
Yes. The PROV bulletin lists Maine Plumbing Tables based on the 2015 UPC and states that personal printed versions are not allowed. It identifies proctor-provided tables at the test site.
Official Plumbing Examination Topics
Drainage, Waste and Sanitary Venting, with 18 questions.
Water Supply Systems, Including Backflow Prevention and Water Heaters, contains 16 questions.
15 questions.
Yes. General Regulations contains 10 questions in the official blueprint.
Yes. Plumbing Fixtures contains five questions, and Traps and Interceptors contains five questions.
Yes. Indirect Waste contains three questions.
Yes. Roof Drainage contains five questions.
Yes. Plumbing measurements, sizing, pressure, slopes, and basic calculations support several official examination subjects.
Licensing Fees and Advancement
The Board currently lists a $200 license fee and a separate $21 criminal background-check fee.
Every two years based on the first licensure date.
Yes. Maine provides a separate Master Plumber examination and licensing pathway with additional experience requirements.
No. The published Master Plumber exam has 100 questions, three hours, and a 75% passing score, while the Journeyman exam has 80 questions and a 70% passing score.
Contractor Exam Preps Study Products
Yes. Contractor Exam Preps sells a general Journeyman Plumber Exam Study Guide based on the 2021 Uniform Plumbing Code.
The UPC-based product listing identifies 990 practice questions with answer keys.
Yes. The store offers a Journeyman Plumber Test Success Online Course based on the 2021 UPC.
No. It is a supplemental UPC-based study product. Maine's current PROV examination bulletin lists its own official subject outline and references, including the 2015 UPC.
No. Applicants must independently satisfy Board experience requirements, obtain examination approval, pass the required test, and complete the licensing application.
Watch this related 1ExamPrep video covering Journeyman Plumber exam preparation, code study, piping systems, water supply, drainage, venting, fixtures, and test-taking strategies.
This video provides general journeyman plumbing preparation rather than Maine-specific PROV testing instructions. Maine candidates must remember that their examination is closed book and uses the current official PROV question breakdown.
Video: Pass the 2026 Journeyman Plumber Exam.
Creator: 1ExamPrep.
Subjects: Plumbing code, piping, water supply, drainage, fixtures, vents, water heaters, and exam strategies.
Maine-specific examination: 80 questions, 180 minutes, closed book, 70% to pass.
Code distinction: Maine currently adopts the 2021 UPC, while the PROV examination study references still list the 2015 UPC.
Maine license: Journeyman Plumber.
State Board: Maine Plumbers' Examining Board.
Exam provider: PROV.
Exam: 80 questions, three hours.
Passing: 70%, or 56 correct answers.
Exam policy: Closed book.
Current state code: 2021 UPC with Maine amendments.
PROV study-reference UPC: 2015.
Relevant store resources: 2021 UPC Journeyman Plumber guide and online course.
Preparing for the Maine Journeyman Plumber examination is an important step toward earning a professional plumbing license.
Maine regulates plumbing licensing through the Plumbers' Examining Board and the Office of Professional and Occupational Regulation.
The Journeyman Plumber classification is an individual trade license for qualifying plumbing professionals.
It recognizes experience, technical knowledge, and the ability to understand important plumbing installation requirements.
Applicants must meet Maine's licensing standards before they can obtain the credential.
The standard trainee pathway requires at least two years and 4,000 hours of supervised plumbing installation work.
That work must be completed under the required supervision of a licensed Master Plumber.
An alternative route is available for qualifying Journeymen-in-Training.
That route requires 2,000 hours of qualifying supervised installation experience within the four-year period allowed under the Journeyman-in-Training licensing requirements.
Applicants should maintain work-hour records and obtain the required experience verification.
Before taking the examination, candidates must receive approval from the Maine Plumbers' Examining Board.
After approval, they schedule the examination through PROV.
The official Journeyman Plumber examination contains 80 questions.
Candidates have three hours, or 180 minutes, to finish.
A minimum score of 70% is required to pass.
That equals 56 correct answers.
The test is closed book.
This is one of the most important preparation details.
Candidates should not expect to bring their personal UPC book into the examination room.
The exam requires knowledge that can be applied without relying on notes or study references.
Students should therefore spend time learning the plumbing concepts and then practice answering questions without looking them up.
The examination contains nine official subject areas.
Drainage, Waste and Sanitary Venting is the largest category, with 18 questions.
Water Supply Systems, Including Backflow Prevention and Water Heaters, contains 16 questions.
General Knowledge has 15 questions.
General Regulations contains 10.
The remaining questions cover Plumbing Fixtures, Traps and Interceptors, Specialty Venting, Indirect Waste, and Roof Drainage.
Each subject contributes to the final result.
Although the largest categories deserve extra study time, a balanced approach is essential.
Plumbing candidates should understand potable water systems, pipe sizing, water pressure, fixtures, drains, vents, traps, interceptors, and water heaters.
They should also review plumbing measurements, calculations, and isometric drawings.
These subjects support practical plumbing work and examination preparation.
Maine also has an important plumbing-code distinction.
The state currently adopts the 2021 Uniform Plumbing Code with Maine amendments as its internal plumbing installation standard.
However, the January 2026 PROV examination study references still identify the 2015 UPC.
Both facts matter.
For actual plumbing installations, workers must follow the currently adopted Maine code and applicable amendments.
For examination preparation, candidates should review the published PROV bulletin and the reference editions it identifies.
Because the examination is closed book, these references are for studying before the examination, not for personal use during testing.
Contractor Exam Preps offers related UPC-based plumbing study materials.
The Journeyman Plumber Exam Study Guide Based on the 2021 Uniform Plumbing Code includes 990 practice questions with answer keys.
It covers plumbing trade knowledge, drainage, venting, water distribution, fixtures, calculations, and isometric drawings.
The Journeyman Plumber Test Success Online Course provides additional structured UPC-based instruction and practice.
These products can help candidates organize study sessions and review important plumbing concepts.
They are supplemental educational resources rather than official Maine PROV examinations.
Students should verify information against Maine's licensing rules and current candidate bulletin.
A six-week study plan can make preparation more manageable.
Start with plumbing terminology and general regulations.
Continue with water supply, water heaters, and backflow protection.
Spend extra time on drainage, waste, and sanitary venting because these make up the largest part of the exam.
Then review fixtures, traps, specialty venting, indirect waste, and roof drainage.
Practice plumbing mathematics and diagram interpretation.
During the final week, take 80-question closed-book practice examinations using a three-hour timer.
Review incorrect answers afterward and return to any weak subjects.
When the actual examination is completed successfully, candidates must finish the state license application process.
The Board currently lists a $200 Journeyman Plumber license fee and a separate $21 background-check fee.
The license renews every two years, with a listed $200 biennial renewal fee.
Applicants should confirm all current charges and licensing requirements directly with OPOR.
Maine also offers the Master Plumber licensing classification.
Journeyman plumbers who wish to advance should review the separate experience and examination requirements for that higher-level license.
With proper supervised experience, accurate documentation, consistent plumbing study, and realistic closed-book practice, Maine candidates can approach the examination with a clearer plan.
The purpose of preparation is not only to pass a licensing test.
It is also to build the plumbing knowledge needed to protect potable water, install drainage and venting correctly, understand code requirements, and perform quality work safely.
Find Journeyman Plumber study guides, plumbing courses, and related contractor licensing resources at ContractorExamPreps.com.
