- What "MA-MP" Actually Stands For
- Who Administers the Exam
- Why the Full Name Matters for Your Prep
- How the Name Maps to Exam Structure
- Getting to the Testing Chair: Eligibility Behind the Title
- Fees Tied to the MA-MP Designation
- What Happens After You Earn the Title
- Scheduling Study Time Around the Name's Two Parts
- Frequently Asked Questions
- MA-MP stands for the Massachusetts Master Plumber License Exam, administered by PSI Services LLC for the state Board.
- The exam has two parts: 80-question Written (160 minutes) and 40-question Practical (160 minutes).
- A passing score of 70% is required on each part independently - not a combined average.
- Candidates need a journeyman license, 1,700 hours/1 year of qualifying work, and 110-hour Tier Five education.
What "MA-MP" Actually Stands For
MA-MP stands for the Massachusetts Master Plumber License Exam. The letters are shorthand used across scheduling systems, prep resources, and this site - "MA" for the Commonwealth of Massachusetts, and "MP" for Master Plumber. It is the credential exam a licensed journeyman plumber sits for after accumulating enough field experience and completing required coursework, and it's the final testing gate before someone can legally hold the title of Master Plumber in Massachusetts.
It's worth being explicit about this because the letters "MA-MP" get reused elsewhere for completely unrelated certifications. On this site, and in every article linked below, MA-MP refers only to the Massachusetts trade licensing exam described in the What Is MA-MP? overview and detailed further in our piece on MA-MP Meaning. If you found this page while researching a different field, this is not that exam.
Who Administers the Exam
The exam is developed and overseen by the Massachusetts Board of State Examiners of Plumbers and Gas Fitters, part of the Division of Occupational Licensure. Day-to-day test delivery - scheduling, computer-based testing centers, score reporting - is handled by PSI Services LLC, a third-party testing vendor the Board contracts with. The most recent PSI candidate bulletin is dated October 3, 2025, and it's the authoritative document for exam content outlines, references, and policies.
This two-party structure (state Board sets requirements and content; PSI delivers the test) is standard for occupational licensing exams, but it matters for MA-MP candidates specifically because your license application, CORI check, and renewal all run through the state's eLIPSE system, while your actual test appointment, calculator rules, and scoring come from PSI's bulletin. Confusing the two can cause candidates to look for exam-day policies on the wrong website.
Why the Full Name Matters for Your Prep
Knowing that MA-MP means "Massachusetts Master Plumber License Exam" - and not some generic national plumbing credential - changes how you should prepare. This exam is built entirely around Massachusetts-specific code references: 248 CMR 10.00-10.23 (the Massachusetts Uniform State Plumbing Code, 2023 edition), specified 2021 and 2014 sections of 248 CMR, NFPA 54 (National Fuel Gas Code, 2012), NFPA 58 (Liquefied Petroleum Gas Code, 2011), and MGL Chapter 142. A generic national plumbing study guide won't map cleanly onto these citations, and neither will content written for a different credential that happens to share the same initials.
For a full breakdown of how these code references translate into testable content, see the MA-MP Exam Domains 2026: Complete Guide to All 16 Content Areas. Understanding the name is step one; understanding what the name implies about content weighting is step two.
How the Name Maps to Exam Structure
Because "Master Plumber" is the operative half of the acronym, the exam is structured around two distinct skill demonstrations that a master-level tradesperson is expected to hold: technical knowledge (Written) and applied problem-solving (Practical).
| Part | Format | Questions | Time | Passing Score |
|---|---|---|---|---|
| Part I - Written | Closed-book, computer-generated | 80 | 160 minutes | 70% |
| Part II - Practical | Closed-book, isometric/calculation-based | 40 | 160 minutes | 70% |
| Combined (Exam line) | - | 120 | 320 minutes | 70% on each part separately |
Note the last row: the 320-minute, 120-question combined figures describe the exam line total, not one interchangeable pool of time you can shift between parts. Each part is independently timed and independently scored, and you must clear 70% on Part I and 70% on Part II separately - a strong Written score cannot offset a weak Practical score. This is covered in more depth in our article on the MA-MP Passing Score 2026: Exactly What You Need to Pass.
Part I - Written (Domains 1-12, 80 items)
Covers the regulatory and system-design knowledge a master plumber applies daily, from permitting to piping materials.
- General Regulations, Inspections, and Permits - 9 items
- Gas Piping, Equipment, and Appliances - 21 items (largest domain in Part I)
- Venting - 12 items
- Traps and Cleanouts - 2 items
- Fixtures, Equipment, and Clearances - 2 items
- Water Heaters - 3 items
- Piping, Valves, and Controls - 3 items
- Water Supply - 6 items
- Hangers and Supports - 2 items
- Drain, Waste, and Vent - 13 items
- Separators, Interceptors, and Grease Traps - 5 items
- Joints and Connections - 2 items
Part II - Practical (Domains 13-16, 40 items)
Tests the ability to interpret isometric drawings and run trade math under time pressure, closed-book.
- Isometric Analysis - 20 items (largest domain in Part II)
- General Trade Calculations - 5 items
- Gas Piping - 7 items
- Gas Venting - 8 items
The disproportionate weight on Gas Piping, Equipment, and Appliances in Part I, and on Isometric Analysis in Part II, is worth building your entire study calendar around. If you only remember two numbers from this article, make them 21 and 20.
Key Takeaway
Because both parts require an independent 70%, spend real, dedicated block time on Isometric Analysis even if your Written-side confidence is high - Part II failure is the more common trip-up for experienced tradespeople who under-practice trade math.
Getting to the Testing Chair: Eligibility Behind the Title
You don't sit for the MA-MP exam cold. The title "Master Plumber" implies a documented progression, and the Board enforces it before PSI will even schedule you:
- An active Massachusetts journeyman plumber license
- At least one year and 1,700 hours of qualifying work performed as a licensed journeyman
- Completion of the Board-approved 110-hour Tier Five education requirement (not required again if already completed during your apprenticeship)
Application happens online and requires verification of your experience and education, a notarized CORI acknowledgement, and a passport-style photo, all subject to Board approval before you're cleared to test. These mechanics are laid out fully in our MA-MP Requirements 2026: Eligibility, Prerequisites & How to Qualify guide - worth reading before you spend money on the application.
Fees Tied to the MA-MP Designation
Every fee below is specific to the Massachusetts Master Plumber License Exam pathway - don't reuse numbers from any other "MA-MP" you may encounter elsewhere online.
- $80 examination administration fee for an initial attempt or a retake
- $31 separate application fee
- $78 initial license fee once you pass and are approved
- $78 master-plumber renewal fee, due biennially
For the complete cost picture, including how retake fees stack if you fail only one part, see MA-MP Certification Cost 2026: Complete Pricing Breakdown.
What Happens After You Earn the Title
Passing both parts doesn't end your relationship with the "MP" in MA-MP - it's a license you maintain, not a one-time badge. A few mechanics to know:
- A passing part score is valid for one year. If you clear Part I but fail Part II, you only need to retake Part II within that window - the Written pass carries over.
- Master-level attempts are unlimited under the current bulletin, though each attempt (initial or retake) carries the $80 administration fee.
- Licenses are managed through the state's eLIPSE portal and renew biennially by May 1 of even-numbered years.
- Each renewal cycle requires 12 hours of approved continuing education.
Once licensed, most Master Plumbers use the credential to supervise crews, pull permits, run their own plumbing business, or qualify for higher-level roles on commercial projects - topics covered in MA-MP Jobs and MA-MP Salary Guide 2026: Complete Earnings Analysis. If you're still weighing whether the licensing investment is worth it relative to staying a journeyman, our Is the MA-MP Certification Worth It? Complete ROI Analysis 2026 article walks through the tradeoffs without inventing numbers the Board hasn't published.
Scheduling Study Time Around the Name's Two Parts
Because MA-MP splits cleanly into a Written knowledge test and a Practical skills test, your prep calendar should mirror that split rather than treating the exam as one undifferentiated 120-question block.
Written Foundation - Gas Piping First
- Work through 248 CMR sections tied to gas piping, equipment, and appliances since it's 21 of 80 Written items
- Review NFPA 54 fuel gas code sections referenced in the bulletin
Written Remainder - DWV and Venting
- Drain, Waste, and Vent (13 items) and Venting (12 items) are the next-largest domains - drill these next
- Round out smaller domains (Traps, Fixtures, Hangers, Joints) with lighter review since each carries only 2-3 items
Practical - Isometric Analysis
- Practice reading isometric drawings under timed conditions since this domain alone is 20 of 40 Practical items
- Work trade calculation problems by hand using only a silent, non-programmable calculator, since that's the only aid PSI permits
Gas Piping and Gas Venting (Practical)
- Layer in NFPA 58 LP-gas concepts for the Gas Piping domain (7 items)
- Practice Gas Venting calculations (8 items) alongside general trade math review
Full Simulation and Weak-Spot Review
- Run full-length, separately timed practice sessions mirroring the 160/160-minute structure
- Revisit whichever part scores below 70% in simulation
This is a light structural framework, not a rigid formula - adjust the weeks to your own schedule and prior experience. For a deeper, MA-MP-specific study methodology including reference-book strategy and pacing drills, see the MA-MP Study Guide 2026: How to Pass on Your First Attempt. You can also run through timed practice questions organized by domain on our practice test platform to see where your Written and Practical readiness actually stand before exam day.
If you're still building general comfort with what each domain actually tests before committing to a week-by-week plan, our How Hard Is the MA-MP Exam? Complete Difficulty Guide 2026 article and the MA-MP Pass Rate 2026: What the Data Shows breakdown are good next reads. You can also check upcoming testing windows in MA-MP Exam Dates 2026: Testing Windows, Deadlines & Scheduling so your study calendar lines up with an actual appointment, and keep a condensed reference nearby using the MA-MP Cheat Sheet 2026: One-Page Review of Must-Know Facts during your final review week.
Frequently Asked Questions
On this site and in the context of Massachusetts trade licensing, no. MA-MP refers exclusively to the Massachusetts Master Plumber License Exam administered through PSI Services LLC for the Massachusetts Board of State Examiners of Plumbers and Gas Fitters. Other industries use the same letters for unrelated credentials - those are not covered here.
It's administered as two independently timed and independently scored parts under a single exam line: Part I Written (80 questions, 160 minutes) and Part II Practical (40 questions, 160 minutes). You need 70% on each part, not a combined average.
No. A passing part score remains valid for one year, so if you pass Part I but fail Part II (or vice versa), you only need to retake the failed part within that window, paying the $80 administration fee for that retake.
You need an active Massachusetts journeyman plumber license, at least one year and 1,700 hours of qualifying journeyman work, and completion of the Board-approved 110-hour Tier Five education (unless already completed as an apprentice), plus a completed online application with experience/education verification, notarized CORI acknowledgement, and a photo.
Once approved, you pay the $78 initial license fee and your license is managed through the state's eLIPSE system. Renewal happens biennially by May 1 of even-numbered years, costs $78, and requires 12 hours of approved continuing education per cycle.