Massachusetts Plumbing Board • PSI • Part I: 80 Questions • Part II: 40 Questions • 70% Each Part • Closed Book
Ready to take the next step in your plumbing career? This Massachusetts Journeyman Plumber Contractor Exam Prep guide explains how to qualify for your license, prepare for both PSI examinations, study Massachusetts plumbing and gas-fitting regulations, and choose useful practice materials from Contractor Exam Preps.
Massachusetts issues statewide plumbing licenses through the Board of State Examiners of Plumbers and Gas Fitters, part of the Division of Occupational Licensure.
The official Journeyman Plumber license represents an important milestone for plumbing professionals who have completed the required apprenticeship experience and classroom training.
Unlike states that use a single open-book plumbing examination, Massachusetts requires candidates to pass two separate closed-book examinations.
The first test is the Journeyman Plumber Part I Written examination.
According to PSI's October 3, 2025 candidate bulletin, Part I includes 80 questions and allows 160 minutes.
The second test is the Journeyman Plumber Part II Practical examination.
Part II includes 40 questions and also allows 160 minutes.
Despite the name "Practical," Part II is a computer-delivered examination, not a requirement to build a pipe system inside the testing center.
Part II focuses heavily on isometric analysis, general trade calculations, gas piping, and gas venting.
Both parts require a minimum passing score of 70%.
That means applicants generally need at least 56 correct answers out of 80 on Part I and 28 correct answers out of 40 on Part II.
Each examination part is scored independently.
If a candidate passes one portion but fails the other, the candidate normally retakes only the failed portion, subject to the Board's examination rules and score-validity period.
The official bulletin states that passing scores remain valid for one year.
For the standard licensing pathway, Massachusetts requires at least 6,800 clock hours of qualifying plumbing work as a licensed apprentice.
The work must be performed under the direct supervision required by Massachusetts law, typically through a licensed Master Plumber or an appropriately employed Journeyman Plumber.
Applicants must also complete 550 clock hours of plumbing and gas-fitting theory education over a period of at least four years.
A high school diploma or equivalent is required under the current educational qualification rules.
The Board's education regulations include additional rules about the timing of training, school-hour credits, and apprenticeship participation.
Applicants should review the latest 248 CMR 11.00 education and experience regulations before submitting an examination application.
Massachusetts also has its own plumbing code.
The Massachusetts Uniform State Plumbing Code is found in 248 CMR 10.00, rather than simply using the International Plumbing Code without amendments.
The PSI reference list includes the 2023 Massachusetts Uniform State Plumbing Code, along with the state's plumbing administration and gas-fitting regulations.
The bulletin also references NFPA 54, NFPA 58, and Massachusetts General Laws Chapter 142.
These references are used to prepare the examination questions, but they are not allowed inside the examination center.
Because Massachusetts tests are closed book, candidates must learn the relevant rules and develop the ability to answer questions without checking a reference during the examination.
This makes preparation different from a test where candidates can flip through codebooks until they find an answer.
Studying 248 CMR, practicing plumbing mathematics, and repeatedly working through isometric diagrams are essential parts of a strong preparation plan.
Contractor Exam Preps offers general journeyman plumbing resources that can support those skills.
The Journeyman Plumber Exam Study Guide includes practice questions, plumbing mathematics, isometric analysis, plumbing principles, and study techniques.
The Journeyman Plumber Exam Prep Package combines the study guide with a 2021 International Plumbing Code paperback and reference tabs.
For candidates who prefer online lessons and computer-based practice, the Journeyman Plumber Ultimate Exam Prep Package adds video instruction and simulated examinations.
These resources are useful for general plumbing study, but there is an important distinction.
The products are based on the 2021 International Plumbing Code.
Massachusetts primarily tests its own 248 CMR plumbing and gas-fitting regulations, so the IPC study packages should be used as supplemental education rather than replacements for state-specific references.
The printed codebook and tabs included in these packages are not permitted in the Massachusetts closed-book PSI examinations.
When preparing for Part I, devote plenty of time to Gas Piping, Equipment and Appliances.
This category contains 21 of the 80 written questions.
Drain, Waste and Vent contains another 13 questions, while Venting contributes 12 questions.
General Regulations, Inspections and Permits includes nine questions.
Other subjects include water supply, water heaters, fixtures, valves, traps, cleanouts, supports, interceptors, and joints.
Part II presents a different challenge.
Isometric Analysis accounts for 20 of the 40 practical examination questions.
That is half of Part II.
Gas Venting adds eight questions, Gas Piping includes seven, and General Trade Calculations contains five.
Candidates should learn how to interpret piping diagrams, follow fixture connections, understand vent relationships, and solve plumbing mathematics problems without depending on an open reference.
A pipe drawing may look simple until you have to determine which line represents the drain, which line is the vent, and which connection changes the answer.
That is exactly why repeated practice matters!
Massachusetts candidates can use a six-week study schedule to organize code review, gas piping, DWV systems, isometric diagrams, plumbing calculations, and timed examination sessions.
By the final week, a student should be able to complete an 80-question written practice test in 160 minutes and a separate 40-question practical simulation in 160 minutes.
This guide includes the official licensing pathway, complete examination topic breakdowns, Massachusetts plumbing references, a drainage diagram, a licensing roadmap, study strategies, Contractor Exam Preps products, interactive FAQs, a related 1ExamPrep YouTube video, and state resources.
Important Massachusetts Journeyman Plumber 2026 Update: Massachusetts uses a two-part CLOSED-BOOK PSI plumbing examination. Part I includes 80 questions in 160 minutes, and Part II includes 40 questions in 160 minutes. A separate 70% passing score is required on both parts. The standard experience requirement is 6,800 qualifying apprentice hours, plus 550 classroom hours of plumbing and gas-fitting theory over at least four years. The current PSI study-reference list includes the 2023 Massachusetts Uniform State Plumbing Code, 248 CMR 10.00. General 2021 IPC-based study packages from Contractor Exam Preps can help with plumbing calculations, diagrams, drainage, and trade review, but they are not Massachusetts's official code and cannot be brought into the closed-book testing room.
A Massachusetts Journeyman Plumber is a state-licensed tradesperson qualified to perform plumbing and associated gas-fitting work within the scope established by Massachusetts law.
The credential is issued by the Board of State Examiners of Plumbers and Gas Fitters.
Journeyman plumbers install, maintain, repair, and troubleshoot plumbing systems that bring water into buildings and move wastewater safely away.
Typical work may include potable-water distribution, sanitary drainage, vent systems, fixtures, water heaters, valves, traps, cleanouts, backflow protection, and piping connections.
Massachusetts plumbing work must comply with the applicable provisions of 248 CMR and Massachusetts General Laws Chapter 142.
The state's plumbing code establishes rules covering materials, installation practices, public health, inspections, and system operation.
Plumbers also need to understand gas piping and venting because those subjects are part of the Massachusetts Journeyman Plumber examinations.
The Journeyman Plumber license is not the same as a Master Plumber license.
A Master Plumber has separate education, experience, licensing, and business requirements.
Massachusetts also has a separate plumbing business license process for qualifying firms and entities.
Anyone planning to open a plumbing contracting business should review those rules rather than assuming that obtaining a Journeyman license automatically authorizes all contractor business activities.
Journeyman plumbers play an important role in protecting drinking water, maintaining sanitary systems, and preventing unsafe gas installations.
The work requires practical experience and the ability to interpret technical requirements correctly.
Credential: Massachusetts Journeyman Plumber.
Board: Board of State Examiners of Plumbers and Gas Fitters.
State code: 248 CMR 10.00 and related requirements.
Exam provider: PSI Services LLC.
Standard work requirement: 6,800 apprentice hours.
Standard education: 550 hours over at least four years.
| Step | Requirement | What to Prepare |
|---|---|---|
| Confirm Credential | Journeyman Plumber | Review Massachusetts plumbing license classifications. |
| License Authority | State Plumbing Board | Review current Board application instructions. |
| Apprentice License | Required | Document your licensed apprentice status. |
| Qualifying Experience | 6,800 Hours | Gather proof of approved plumbing work. |
| Required Supervision | Massachusetts Licensed Master or Properly Employed Journeyman | Obtain signed experience verification. |
| Plumbing Theory | 550 Hours | Complete approved plumbing and gas-fitting classroom education. |
| Education Duration | At Least Four Years | Follow the timing requirements in 248 CMR 11. |
| High School Education | Diploma or Equivalent | Maintain education documentation. |
| School Verification | Required Form | Obtain a signed Education Verification Form. |
| Employer Verification | Required Form | Obtain a Statement of Experience signed by the supervising Master Plumber. |
| Applicant Photograph | 2 × 2 Passport Photo | Upload the required current image. |
| CORI Acknowledgement | Required | Prepare the notarized form as instructed. |
| Application Portal | eLIPSE | Apply through Massachusetts online licensing. |
| Application Fee | $31 Listed | Check current Board fees. |
| Board Approval | Required Before Examination | Wait for eligibility approval and PSI notice. |
| Testing Provider | PSI | Schedule both examination parts. |
| Part I Written | 80 Questions | Study the 12 published written categories. |
| Part I Time | 160 Minutes | Practice two-hour-and-forty-minute simulations. |
| Part II Practical | 40 Questions | Study isometrics, calculations, gas piping, and venting. |
| Part II Time | 160 Minutes | Practice computer-style isometric problems. |
| Passing Standard | 70% Each Part | Pass both independent examinations. |
| Exam Format | Closed Book | Do not bring reference books into the exam room. |
| PSI Examination Fee | $80 Listed | Confirm the current registration amount. |
| License Fee | $52 Listed | Complete payment through the current licensing process. |
| Licensure | Pass Both Parts | Complete final Board licensing steps. |
The Massachusetts Journeyman Plumber examination is divided into two independent parts. The table below follows PSI's October 2025 bulletin, which is the relevant published guide available for the 2026 examination cycle.
| Exam Detail | Category | Published Information |
|---|---|---|
| State | Licensing | Massachusetts |
| Official Credential | Board | Journeyman Plumber |
| Licensing Board | Authority | Board of State Examiners of Plumbers and Gas Fitters |
| Testing Provider | Testing | PSI Services LLC |
| Examination Parts | Testing | Two |
| Part I Name | Testing | Written |
| Part I Questions | Testing | 80 |
| Part I Time | Testing | 160 Minutes |
| Part I Passing | Testing | 70%, Typically 56 of 80 |
| Part II Name | Testing | Practical |
| Part II Delivery | Testing | Computer-Generated Questions |
| Part II Questions | Testing | 40 |
| Part II Time | Testing | 160 Minutes |
| Part II Passing | Testing | 70%, Typically 28 of 40 |
| Combined Questions | Testing | 120 |
| Combined Maximum Time | Testing | 320 Minutes Across Both Parts |
| Examination Format | Testing | Closed Book |
| Books in Testing Room | Testing | Not Permitted |
| Independent Scoring | Testing | Each Part Must Be Passed |
| Passing Score Validity | Testing | One Year Under Published Bulletin |
| Part I Regulations and Permits | Blueprint | 9 Questions |
| Part I Gas Piping and Equipment | Blueprint | 21 Questions |
| Part I Venting | Blueprint | 12 Questions |
| Part I Traps and Cleanouts | Blueprint | 2 Questions |
| Part I Fixtures and Clearances | Blueprint | 2 Questions |
| Part I Water Heaters | Blueprint | 3 Questions |
| Part I Piping, Valves and Controls | Blueprint | 3 Questions |
| Part I Water Supply | Blueprint | 6 Questions |
| Part I Hangers and Supports | Blueprint | 2 Questions |
| Part I Drain, Waste and Vent | Blueprint | 13 Questions |
| Part I Interceptors and Separators | Blueprint | 5 Questions |
| Part I Joints and Connections | Blueprint | 2 Questions |
| Part II Isometric Analysis | Blueprint | 20 Questions |
| Part II Trade Calculations | Blueprint | 5 Questions |
| Part II Gas Piping | Blueprint | 7 Questions |
| Part II Gas Venting | Blueprint | 8 Questions |
| PSI Plumbing Code Reference | Study | 2023 Massachusetts Uniform State Plumbing Code, 248 CMR 10 |
| National Gas Code | Study | NFPA 54, 2012 Listed |
| LP Gas Code | Study | NFPA 58, 2011 Listed |
| Application Fee | Board | $31 Listed |
| Examination Fee | PSI | $80 Listed |
| License Fee | Board | $52 Listed |
Part I: 80 questions in 160 minutes.
Part II: 40 questions in 160 minutes.
Passing: 70% on each independent part.
Format: Closed book.
Primary state code: Massachusetts 248 CMR 10, 2023 edition listed by PSI.
Massachusetts has two separate plumbing examinations. Part I tests written plumbing and gas-fitting knowledge. Part II emphasizes isometric drawings, trade calculations, gas piping, and gas venting.
Study MGL Chapter 142, relevant administrative sections of 248 CMR, plumbing permits, inspection procedures, workplace safety, excavation rules, and the responsibilities of licensed tradespeople.
This is the largest Part I category. Review gas-piping design, permitted materials, testing and purging, CSST, underground installation, regulators, combustion air, equipment adjustments, and applicable Massachusetts gas code requirements.
Study natural-draft venting, positive and non-positive venting, chimneys, sizing, proper materials, and appliance venting requirements.
Review trap function, trap seals, cleanout access, and basic requirements for preventing sewer gases from entering occupied spaces.
Review fixture installation, equipment requirements, and clearances relevant to Massachusetts plumbing regulations.
Study hot-water tanks, water heaters, piping connections, temperature controls, and applicable legal requirements.
Learn the purpose and operation of piping components, control valves, shutoffs, and related installation requirements.
Review potable-water distribution, piping materials, water temperature, pressure, backflow prevention, and the protection of drinking-water systems.
Study proper pipe support, fastening, physical protection, and common installation considerations.
Review sanitary drainage, storm drainage, indirect waste, special waste, drainage materials, pipe sizing, venting, fixture connections, and system layout.
Understand grease interceptors, holding tanks, gasoline and oil separators, sand separators, and why these devices protect drainage systems.
Review approved joining methods, piping material compatibility, connections, and safe installation practices.
Half of the practical examination involves isometric analysis. Study three-dimensional piping diagrams, drainage routes, vent connections, fixture branches, changes in direction, and the relationship between vertical and horizontal piping.
Practice plumbing mathematics, measurements, conversions, developed length, offsets, pipe sizing, and general trade problem solving.
Practice gas piping layouts, pipe sizing, materials, gas-system components, and installation scenarios.
Study vent sizing, venting configurations, appliance requirements, natural draft, chimney connections, and approved installation methods.
Largest Part I topic: Gas Piping, Equipment and Appliances, 21 questions.
Second-largest Part I: Drain, Waste and Vent, 13 questions.
Largest Part II: Isometric Analysis, 20 questions.
Part II emphasis: Isometrics, gas piping, gas venting, and trade calculations.
Begin with the current PSI examination bulletin and create separate study checklists for Part I and Part II.
This matters because the two examinations focus on different skills.
Part I is a written knowledge examination with 80 questions.
Part II is a computer-delivered practical examination with 40 questions, many involving isometric analysis.
Review the Massachusetts plumbing code, 248 CMR 10, and related state gas-fitting regulations before attempting full-length practice tests.
Study the rules for plumbing permits, inspections, water supply, drainage, fixtures, materials, gas piping, gas venting, and safety.
For Part I, spend additional time on gas piping and appliances because that category has 21 questions.
Then review drainage and venting, followed by gas venting, administrative rules, water supply, interceptors, water heaters, and other written topics.
For Part II, begin with isometric drawings.
Half of the practical examination involves isometric analysis, so repeated practice is important.
Learn how to trace drainage piping, identify vents, recognize changes in direction, and understand how fixtures connect to the system.
Practice viewing a three-dimensional layout and converting it into a clear mental picture of the piping arrangement.
Next, work through trade calculations, gas pipe layouts, and gas venting situations.
Use study books while learning, but gradually practice answering questions without reference materials.
Because the official examinations are closed book, your final practice sessions should match those conditions.
The Journeyman Plumber Exam Study Guide provides general plumbing questions, math review, and isometric practice.
The Ultimate Journeyman Plumber Exam Prep Package adds online lessons and simulated computer-based questions.
Remember that these products use the 2021 IPC as their study foundation. Massachusetts candidates should independently review the 248 CMR requirements and the current PSI blueprint.
Finish each study day by reviewing missed questions. Identify why the correct answer is correct, not merely which letter you should remember.
Part I priority: Gas piping, DWV, venting, and regulations.
Part II priority: Isometric analysis.
Other practical topics: Gas venting, gas piping, and mathematics.
Final preparation: Closed-book timed mock examinations.
Plumbing isometric analysis is one of the most important parts of the Massachusetts practical examination.
Understanding where water enters a fixture, how waste exits, and how vent piping connects helps prepare candidates for three-dimensional plumbing diagrams.
Simplified educational diagram. Not an approved plumbing installation design or code-compliant construction plan.
Make sure your apprentice license and employment records meet Massachusetts Board requirements.
Document at least 6,800 qualifying clock hours under approved plumbing supervision.
Complete 550 hours of approved plumbing and gas-fitting theory over the required period.
Gather school verification, supervising employer experience forms, photograph, and required CORI acknowledgement.
Submit the online application and wait for Board examination eligibility approval.
Prepare Part I trade regulations, gas systems and DWV, plus Part II isometric analysis and calculations.
Earn a minimum 70% on each independently scored examination part.
Finish license payment and Board procedures, then review Master Plumber and plumbing business pathways for future advancement.
The bars below show the percentage of each examination part assigned to its published topic. Part I and Part II must be passed separately.
Part I: 80 questions, 100% distributed across 12 subjects.
Part II: 40 questions, 100% distributed across four subjects.
Largest written topic: Gas Piping, 21 questions.
Largest practical topic: Isometric Analysis, 20 questions.
Passing: 70% independently on both parts.
Massachusetts uses a state-specific plumbing and gas-fitting regulatory framework. The PSI examination reference list is for studying, not for bringing books into the testing room.
The official candidate bulletin states that the plumbing examinations are closed book.
| Book or Reference | Edition | Purpose |
|---|---|---|
| 248 CMR 10.00 to 10.23 | 2023 | Massachusetts Uniform State Plumbing Code for plumbing requirements and exam study. |
| 248 CMR 3.00 | 2021 PSI Listing | Administrative plumbing and gas-fitting requirements. |
| 248 CMR 4.00 | 2021 PSI Listing | Massachusetts Fuel Gas Code. |
| 248 CMR 5.00 | 2021 PSI Listing | Massachusetts amendments to NFPA 54. |
| 248 CMR 7.00 | 2014 PSI Listing | Large gas utilization equipment. |
| 248 CMR 11.00 | 2021 PSI Listing; Updated State Regulation Exists | Plumbing education, experience and licensure rules. |
| NFPA 54 | 2012 PSI Listing | National Fuel Gas Code study reference. |
| NFPA 58 | 2011 PSI Listing | Liquefied Petroleum Gas Code study reference. |
| MGL Chapter 142 | Applicable Massachusetts Law | Plumbing and gas-fitting supervision and legal requirements. |
| Journeyman Plumber Study Guide | 2021 IPC Based | General trade practice, plumbing math, and isometric review. |
| 2021 International Plumbing Code | 2021 | Supplemental plumbing education, not the Massachusetts state plumbing code. |
| PSI Massachusetts Candidate Bulletin | October 2025 Published Bulletin | Current exam outline, testing policies, question counts and study references. |
Massachusetts code: 248 CMR 10, not simply the International Plumbing Code.
Retail study package: 2021 IPC based.
PSI format: Closed book.
Exam-room books: Not permitted.
Important: Use the latest state regulations for current licensing and field work, and verify PSI's listed exam editions before studying.
Massachusetts candidates must prepare differently from applicants taking open-book examinations in other states.
At the PSI testing center, codebooks and other reference materials are not permitted in the examination room.
That means candidates must understand the rules, formulas, and installation relationships before test day.
During early study sessions, read the applicable Massachusetts regulations and use general plumbing study materials to explain unfamiliar concepts.
Then gradually complete practice questions without checking the books.
For Part I, practice 80 questions within 160 minutes. That gives you an average of two minutes per question.
For Part II, practice 40 questions within 160 minutes. That gives you an average of four minutes per question, which can be necessary for diagram interpretation and calculations.
Massachusetts Journeyman Plumbers perform regulated plumbing and associated gas-fitting work within the scope authorized by the Commonwealth.
The work can include water service piping, potable-water distribution, plumbing fixtures, valves, sanitary drains, storm drainage, vent piping, water heaters, and related equipment.
Journeyman plumbers must understand the installation requirements that protect public health and maintain safe plumbing operation.
Potable-water systems require protection against contamination.
Drainage systems require properly designed traps and vents.
Gas piping and appliances require appropriate materials, installation methods, testing and venting.
The Massachusetts Uniform State Plumbing Code, 248 CMR 10, controls important installation requirements.
Related regulations and laws address permits, inspections, licensing, and professional responsibilities.
The Journeyman Plumber license is an individual credential.
Operating a plumbing business involves additional responsibilities and may require a Master Plumber and a separate plumbing business license.
Plumbing contractors should verify business registration, permitting, insurance, and inspection requirements before accepting work.
Journeyman Plumber: Individual trade license.
Master Plumber: Separate higher-level credential.
Plumbing business: Separate licensing and business requirements may apply.
Installation standards: Massachusetts 248 CMR.
| Classification | Licensing Authority | Main Difference |
|---|---|---|
| Apprentice Plumber | Massachusetts Plumbing Board | Licensed training position requiring approved supervision. |
| Journeyman Plumber | Massachusetts Plumbing Board | Requires qualifying experience, education, and both PSI examination parts. |
| Master Plumber | Massachusetts Plumbing Board | Advanced credential involving additional experience, education and licensing. |
| Apprentice Gas Fitter | Massachusetts Plumbing Board | Supervised gas-fitting education and experience pathway. |
| Journeyman Gas Fitter | Massachusetts Plumbing Board | Separate gas-fitting credential and examination. |
| Master Gas Fitter | Massachusetts Plumbing Board | Higher-level gas-fitting credential. |
| Journeyman Plumber Written Exam | PSI | 80 questions, 160 minutes, 70% passing. |
| Journeyman Plumber Practical Exam | PSI | 40 computer-delivered questions, 160 minutes, 70% passing. |
| Plumbing Business License | Massachusetts Licensing Authority | Separate business requirements apply to operating a plumbing company. |
Experience and Education
Two Closed-Book Parts
Separate Business Path
This study schedule is organized around the current Massachusetts PSI examination outline. It includes time for Part I written subjects and Part II practical diagrams and calculations.
The Massachusetts Journeyman Plumber examination can be challenging because candidates must demonstrate both broad trade knowledge and the ability to solve practical problems.
The examination is divided into two independent parts, and both are closed book.
That means knowing plumbing concepts in advance is important.
Part I requires knowledge of plumbing regulations, gas piping, appliances, venting, drainage, water supply, fixtures, and related materials.
Gas Piping, Equipment and Appliances is a major category with 21 questions.
Drain, Waste and Vent and Venting are also important.
Part II is different because 20 of its 40 questions involve isometric analysis.
Candidates who rarely work with plumbing drawings may need extra practice before they feel comfortable.
Isometric questions may require tracing a fixture branch through several fittings, identifying the vent path, or understanding the relationship between horizontal and vertical pipes.
General trade calculations can also be difficult when a question includes unfamiliar measurements or several steps.
The closed-book format makes preparation more demanding because students cannot simply search a codebook during the examination.
Use study materials to build understanding, then practice without them.
The Journeyman Plumber Exam Study Guide offers general plumbing questions and math review.
The Journeyman Plumber Ultimate Package offers video lessons and online practice.
Both resources are based on the 2021 IPC, so Massachusetts-specific code study remains necessary.
Practicing each examination part with its own timer helps candidates build stamina and learn how to manage difficult questions.
Contractor Exam Preps offers general Journeyman Plumber study resources that can help Massachusetts candidates practice plumbing mathematics, isometric analysis, fixture systems, DWV, gas systems, and examination techniques.
These are real products listed on the store. They are not described here as Massachusetts Board-approved reference packages.
Because the products use the 2021 International Plumbing Code, Massachusetts candidates should pair them with separate study of 248 CMR and the official PSI examination outline.
Printed Books, Tabs and Online Lessons
Study Guide, 2021 IPC and Tabs
Standalone Printed Study Resource
Massachusetts licensing guide: Contractor Exam Preps Massachusetts Page.
Product code: 2021 IPC.
State examination code: Massachusetts 248 CMR 10 and related regulations.
Exam-room use: No books or study guides are permitted.
Before purchasing: Confirm current product availability and contents.
Journeyman Plumber Exam Prep Package image sourced from ContractorExamPreps.com. The pictured general 2021 IPC-based product is supplemental study material and is not a Massachusetts-specific codebook or government credential. The illustration above is educational.
This educational Massachusetts-themed credential combines plumbing piping imagery, a water droplet, and a state licensing study design.
The accompanying product image comes from the Journeyman Plumber Exam Prep Package sold on Contractor Exam Preps.
• Massachusetts Journeyman Plumber
• State Board of Plumbers and Gas Fitters
• Division of Occupational Licensure
• PSI Plumbing Examinations
• Part I Written
• 80 Written Questions
• 160-Minute Written Exam
• Part II Practical
• 40 Practical Questions
• 160-Minute Practical Exam
• 70% Passing on Each Part
• Closed-Book Testing
• 248 CMR Uniform State Plumbing Code
• MGL Chapter 142
• Plumbing Permit Requirements
• Gas Piping Systems
• Gas Appliances
• Gas Venting
• Combustion Air
• Drain, Waste and Vent
• Sanitary Drainage
• Storm Drainage
• Water Supply Systems
• Water Heaters
• Plumbing Fixtures
• Traps and Cleanouts
• Backflow Prevention
• Piping Materials
• Joints and Connections
• Hangers and Supports
• Grease Interceptors
• Isometric Drawings
• Three-Dimensional Pipe Layouts
• Trade Calculations
• 6,800 Apprentice Work Hours
• 550 Education Hours
• Four-Year Education Period
• Closed-Book Practice Exams
• eLIPSE Licensing Applications
• Master Plumber Advancement
• Plumbing Contractor Requirements
Massachusetts Journeyman Plumber Licensing
The Massachusetts Board of State Examiners of Plumbers and Gas Fitters issues the state Journeyman Plumber credential.
Yes. Massachusetts issues statewide plumber licenses. Local permits and inspections may still apply.
The standard current requirement is at least 6,800 qualifying apprentice work hours under approved supervision.
The standard pathway requires 550 hours of approved plumbing and gas-fitting theory education completed over at least four years.
Yes. The current 248 CMR 11 licensing regulation includes minimum duration and annual-credit rules.
Yes. The standard education requirements include a high school diploma or its equivalent.
The Board lists an Education Verification Form, a supervising Master Plumber Statement of Experience, a 2 × 2 photograph, and a notarized CORI acknowledgement.
Apply through the Massachusetts eLIPSE licensing platform, submit the required documents, and wait for approval before scheduling through PSI.
No. Master Plumber is a separate credential with additional experience, education and licensing requirements.
Massachusetts PSI Journeyman Plumber Examination
PSI Services LLC administers the examinations after the Massachusetts Board approves the candidate.
It has two parts: Part I Written and Part II Practical. Both must be passed.
The current PSI bulletin lists 80 questions for Part I.
Part II includes 40 computer-delivered questions.
160 minutes, or two hours and forty minutes.
Part II also allows 160 minutes.
At least 70% on each part, normally equivalent to 56 correct answers on Part I and 28 on Part II.
No. PSI identifies the Massachusetts plumbing examinations as closed book.
No. The listed reference books are used to develop exam questions but are not permitted inside the testing center.
Normally, candidates retake only the failed part. Passing scores remain valid for one year under the published PSI rules.
No. Part II is a computer-generated examination focusing on isometric analysis, trade calculations, gas piping and gas venting.
Massachusetts Codes and Exam Topics
Massachusetts uses its Uniform State Plumbing Code in 248 CMR 10.00 and related state regulations.
The current published PSI reference list identifies the 2023 Massachusetts Uniform State Plumbing Code, 248 CMR 10.00 through 10.23.
No. Massachusetts has state-specific plumbing regulations. General IPC resources can be used for supplemental education, not as a replacement for 248 CMR.
Gas Piping, Equipment and Appliances, with 21 questions.
The official outline assigns 13 questions to Drain, Waste and Vent.
The Venting category contains 12 questions in the Part I outline.
It is extremely important. Isometric Analysis accounts for 20 of the 40 Part II questions, or half the practical examination.
Yes. General Trade Calculations contains five questions.
Yes. Gas Piping contains seven questions and Gas Venting contains eight questions.
Contractor Exam Preps Plumbing Resources
Yes. The store offers a standalone Journeyman Plumber Study Guide and multiple book-and-course packages.
The store lists 750 practice questions with answer keys, plumbing math review, isometric analysis, OSHA, plumbing code and gas code topics.
It includes the Journeyman Plumber Study Guide, a 2021 International Plumbing Code paperback, and quick-reference tabs.
Yes. The Ultimate Package includes online instruction with approximately eight hours of videos and simulated computer-based examinations.
No. They are general plumbing study resources. Massachusetts candidates should also study state-specific 248 CMR rules, MGL Chapter 142, and the PSI blueprint.
No. The Massachusetts examination is closed book. Codebooks and tabs are for study outside the examination room.
No. Study products support preparation. The Massachusetts Board determines eligibility and licensing, and candidates must pass both examinations.
Watch this related 1ExamPrep plumbing study video for an introduction to International Plumbing Code topics, including water supply, fixtures, sanitary drainage, venting, traps, and code organization.
The video is useful for general plumbing concepts and code literacy, but it is not a Massachusetts-specific 248 CMR lesson. Massachusetts candidates must study the applicable state plumbing code and prepare for both closed-book PSI examination parts.
Video topic: International Plumbing Code Overview.
Creator: 1ExamPrep.
Subjects: Plumbing code fundamentals, fixtures, drainage, venting, water supply, and examination study.
Massachusetts requirement: 248 CMR and state-specific gas-fitting regulations.
PSI format: Two closed-book examinations.
Reminder: The 2021 IPC is a supplemental study resource rather than Massachusetts's official code.
Watch the 1ExamPrep Plumbing Study Video on YouTube
Read Related Massachusetts Journeyman Plumber Exam Prep Information
Use Contractor Exam Preps for general plumbing study guides and practice materials. Use the Massachusetts Board and PSI for official licensing, examination, and state-code requirements.
State: Massachusetts.
Official license: Journeyman Plumber.
Board: Board of State Examiners of Plumbers and Gas Fitters.
Testing provider: PSI Services LLC.
Part I: 80 questions, 160 minutes.
Part II: 40 questions, 160 minutes.
Passing: 70% on each part.
Format: Closed book.
Primary Massachusetts code: 248 CMR 10.
Standard apprenticeship: 6,800 work hours.
Required theory: 550 education hours.
Retail study products: General 2021 IPC-based plumbing preparation.
Preparing for the Massachusetts Journeyman Plumber examination begins with understanding the state's licensing rules and the two-part PSI examination process.
Massachusetts issues Journeyman Plumber licenses through the Board of State Examiners of Plumbers and Gas Fitters.
The license represents a major achievement for plumbing professionals who have completed approved training, practical experience, and the required examinations.
The standard pathway includes 6,800 qualifying clock hours of plumbing work as a licensed apprentice.
Applicants must also complete 550 hours of approved plumbing and gas-fitting theory education over a period of at least four years.
The Board requires experience and education verification and other application documents before granting examination eligibility.
After approval, candidates schedule their examinations through PSI Services LLC.
The Massachusetts Journeyman Plumber examination has two separate parts.
Part I is the Written examination with 80 questions and a 160-minute time limit.
Part II is the Practical examination with 40 questions and a separate 160-minute time limit.
Both examinations are computer-delivered and require a minimum passing score of 70%.
Although Part II is described as practical, it does not require candidates to assemble a plumbing system at the testing center.
Instead, it tests practical knowledge through questions involving piping diagrams, mathematics, gas piping, and venting.
Each examination is scored independently, so candidates must pass both portions to complete the exam requirement.
Massachusetts examinations are closed book.
This is an important difference from plumbing examinations in many other states.
Reference books used for study are not permitted inside the PSI testing room.
That means candidates should learn Massachusetts plumbing requirements well enough to recognize correct answers without relying on a codebook during the examination.
The primary state plumbing code is 248 CMR 10, the Massachusetts Uniform State Plumbing Code.
The PSI bulletin identifies the 2023 edition of that regulation and additional Massachusetts gas-fitting rules, NFPA references, and state plumbing laws as study sources.
Massachusetts candidates should not assume that the International Plumbing Code is interchangeable with the state's own plumbing regulations.
General IPC study material can be useful, but it does not replace Massachusetts-specific code review.
Part I of the examination covers plumbing regulations, permits, gas piping, appliances, venting, DWV, water supply, water heaters, fixtures, traps, interceptors, piping materials, and related installation requirements.
Gas Piping, Equipment and Appliances is the largest written category with 21 questions.
Drain, Waste and Vent contains 13 questions, and Venting contains 12.
These three subjects represent an important share of the written examination.
Applicants should therefore spend extra time on gas systems, drainage, and venting while still reviewing every published topic.
Part II has a different emphasis.
Isometric Analysis contributes 20 of the 40 practical questions, making it half of that examination.
Candidates must learn how to interpret plumbing layouts and understand the relationship between fixtures, drains, vents, branches, and piping direction.
Gas Venting, Gas Piping, and General Trade Calculations complete the practical examination outline.
Repeated diagram practice is especially valuable for plumbers who have limited experience reading isometric drawings.
Contractor Exam Preps offers a general Journeyman Plumber Exam Study Guide with practice questions, plumbing math, isometrics, code review, and test-taking techniques.
The Journeyman Plumber Exam Prep Package also includes a 2021 International Plumbing Code paperback and reference tabs for home study.
The Ultimate Journeyman Plumber Exam Prep Package adds an online course with video lessons and simulated computer-based examinations.
These resources can help strengthen general trade knowledge, but they are not substitutes for the Massachusetts code or PSI's exact examination requirements.
A strong preparation plan should include both state-specific code study and practical question review.
During a six-week study schedule, candidates can focus first on regulations, then gas piping, venting, drainage, water supply, fixtures, and practical diagram questions.
During the final week, use closed-book examination simulations.
Practice Part I with 80 questions and a 160-minute timer.
Then practice Part II with 40 questions and its own 160-minute timer.
Review missed answers carefully and revisit the technical subjects that caused difficulty.
After passing both examination portions, candidates must complete the required licensing steps through the Board.
Those planning to operate a plumbing contracting business should also review Massachusetts Master Plumber and business licensing requirements.
The goal of preparing for this examination is bigger than getting a passing score.
A qualified plumber should understand how plumbing systems protect drinking water, safely remove waste, support reliable fixture operation, and reduce hazards associated with gas systems.
With accurate licensing information, Massachusetts-specific code study, regular mathematics and isometric practice, and helpful Contractor Exam Preps resources, candidates can prepare more effectively for both parts of the Journeyman Plumber examination.
Find plumbing study guides, exam-preparation packages, practice questions, isometric instruction, and online learning resources at ContractorExamPreps.com.
