Maine examines its journeyman plumbers on the 2015 Uniform Plumbing Code — closed book, 80 questions in three hours, with a passing score of 70 percent — even though Maine has adopted the 2021 Uniform Plumbing Code for work in the field. The PassProfessor Maine Journeyman Plumber program prepares candidates for that specific sitting: the 2015 code edition, the Maine Plumbing Laws and Rules, and the discipline of answering without a code book on the desk.
This program is part of the expanding PassProfessor catalog — join the notify list and we’ll email you when enrollment opens.
What this credential certifies
The Maine Journeyman Plumber license is the working license of the Maine plumbing trade. It certifies that the holder has demonstrated, under examination conditions set by the state, a command of the plumbing code and of the Maine laws and rules that govern plumbing work — drainage, waste and vent systems, water supply and distribution, traps and fixtures, sizing, and the installation practices that protect drinking water and public health. A journeyman is the licensed practitioner who performs plumbing work day to day; above this license sits the Master Plumber license, the next step on Maine’s ladder, examined on a larger paper at a higher passing score.
That ladder matters for how a candidate studies. The journeyman examination is not an apprenticeship completion exercise and it is not a general trade-knowledge quiz. It is a code examination with a defined edition, a defined reference set, and a defined passing standard, administered by Prov under its candidate information bulletin for Maine plumbing. Everything in this program is built around that definition: 80 questions, three hours, closed book, 70 percent to pass, on the 2015 Uniform Plumbing Code as published by IAPMO, together with the Maine Plumbing Laws and Rules 2016 and the Maine Plumbing Tables drawn from the 2015 UPC.
For the full step-by-step treatment — the route, the sitting, the study method, and the edition problem worked through in detail — read the companion guide at /maine-journeyman-plumber-exam-guide/.
The examination at a glance
| Item | Verified position |
|---|---|
| Program | Maine Journeyman Plumber |
| Tested code edition | Uniform Plumbing Code 2015 (IAPMO) — the edition the examination is written to |
| Adopted code edition | Uniform Plumbing Code 2021, adopted in Maine effective January 1, 2022 — the edition governing field work; it is NOT the tested edition |
| Book status | CLOSED book |
| Questions | 80 |
| Time allowed | 3 hours |
| Passing score | 70 percent |
| Examination fee | $65 |
| Examination vendor | Prov |
| References named for the sitting | Uniform Plumbing Code 2015; Maine Plumbing Laws and Rules 2016; Maine Plumbing Tables, 2015 UPC, provided by the proctor at the sitting |
| Ladder context | Master Plumber examination: 100 questions, 75 percent passing score |
| Administrator note | PassProfessor is independent and is not affiliated with the Maine regulator or with Prov |
Tested is not adopted: the Maine edition problem
This is the single fact that organises all Maine preparation, and it is the fact generic material most often gets wrong. Maine adopted the 2021 Uniform Plumbing Code, effective January 1, 2022, and that is the code that governs plumbing work installed in Maine. But the journeyman examination is still written to the 2015 Uniform Plumbing Code. Tested and adopted are different editions in Maine, and a candidate is marked against the tested one.
The practical consequence is a two-edition working life. On the job, the journeyman follows the code Maine has adopted. In the examination room, the same person must answer from the 2015 text: its section organisation, its tables, its sizing figures, and its wording. Where the two editions agree, the point is harmless. Where they differ — and code editions always differ somewhere in the details candidates are examined on — the candidate who answers from field habit, rather than from the 2015 text, gives the 2021 answer to a 2015 question and loses the mark. Preparation for Maine therefore has an unusual first step: setting the current field edition to one side and rebuilding fluency in an earlier edition, deliberately and completely.
This program treats that edition discipline as a skill in its own right. Practice material is written to the 2015 UPC throughout, and where a provision is a known point of difference between editions, the material teaches the candidate to recognise which edition a question is speaking from before answering it.
Closed book: what that changes about preparation
Maine’s journeyman examination is closed book. No copy of the Uniform Plumbing Code sits on the desk, no tabs, no marginal notes, no highlighted sizing tables to consult mid-question. That one condition changes the whole shape of study. An open-book candidate can succeed with a well-organised book and a practiced index finger; a closed-book candidate must carry the code’s structure in memory — where a requirement lives, which table governs a sizing problem, and what the governing figure is — before walking into the room.
One detail needs stating precisely, because it is often misread as a loophole. The Maine Plumbing Tables drawn from the 2015 UPC are provided by the proctor at the sitting. Provided tables are part of the examination’s own furniture; they do not convert a closed-book paper into an open-book one. The candidate still cannot bring the code, and the knowledge the tables organise — how to use them, which one applies, how to read a result off them under time pressure — must be learned in advance. Practising with those tables until their layout is familiar is part of closed-book craft, not a substitute for it.
Closed book also sets the arithmetic standard. Sizing and calculation questions must be worked from remembered method: set the problem up, apply the correct table logic, and arrive at a figure, with no text to check the method against. That is a trainable skill, and this program trains it directly rather than assuming field experience will supply it on the day.
What the examination covers
The Prov bulletin names the reference set, and the reference set defines the territory: the 2015 Uniform Plumbing Code, the Maine Plumbing Laws and Rules 2016, and the Maine Plumbing Tables. Within that territory, the work of preparation falls into recognisable areas.
Drainage, waste and vent systems. The heart of the UPC: how waste leaves a building safely, how venting protects trap seals, and how pipe sizes, grades and fittings are chosen so a system drains without siphoning, back-pressure or sewer gas entering occupied space. Venting logic is the area where memorised understanding, not lookup speed, decides marks — which suits a closed-book paper.
Water supply and distribution. Sizing a supply system, understanding fixture units and demand, protecting potable water from contamination, and the materials and joints the 2015 code permits. Backflow and cross-connection reasoning belong here: the candidate must know why a protection is required, not merely that it is.
Traps, interceptors and fixtures. Trap construction and limits, cleanout access, interceptor and separator duties, and the fixture requirements the code sets for the rooms where plumbing meets the public.
Sizing and the Maine Plumbing Tables. Worked problems built on the proctor-provided tables: drainage fixture units, water demand, vent sizing. The skill is method — selecting the right table, entering it with the right values, and reading it accurately at examination pace.
Maine laws and rules. The state layer, drawn from the Maine Plumbing Laws and Rules 2016 named in the bulletin: the licensing framework the candidate is entering, the duties that attach to the license, and the Maine-specific provisions that sit on top of the model code. A candidate who studies only the UPC arrives missing an entire named reference.
The route, in order
The route runs: confirm the Prov candidate information bulletin for the Maine plumbing examinations and read its reference list as the definition of the paper — sit the journeyman examination through Prov, 80 questions in three hours, closed book, with the Maine Plumbing Tables provided in the room — reach the passing score of 70 percent — and receive the Journeyman Plumber license. Candidates planning further should note the rung above: the Master Plumber examination is a 100-question paper with a 75 percent passing score, so the habits built for the journeyman sitting — edition discipline, table fluency, closed-book recall — carry directly into the harder paper later.
What makes this examination demanding
Three things, in combination. First, the edition trap: Maine is a state where the code in the van and the code in the examination room are different books, and the examination rewards the older one. Second, the closed book: eighty questions across the breadth of the UPC, answered from memory in three hours, allow no time to reconstruct a half-learned system from first principles. Third, the state layer: the Maine Plumbing Laws and Rules are a named reference in their own right, and candidates who treat this as a pure model-code paper leave those marks behind. None of the three is unfair; all three are knowable in advance, and each one punishes a different kind of generic preparation.
What the PassProfessor program will cover
Built on the platform architecture: a code core plus a Maine delta. The first layer is original practice material written to the plumbing code territory the UPC defines — drainage, waste and vent, water supply, traps, sizing — written to the 2015 edition specifically, because that is the edition Maine examines. The second layer is the Maine delta: the Maine Plumbing Laws and Rules 2016, the proctor-provided Maine Plumbing Tables and their use, the Prov sitting itself, and the tested-versus-adopted edition discipline stated on this page. Every item is written from scratch against primary sources; no item is drawn from another provider’s material.
Closed-book method, taught as method. Because Maine examines closed book, the program is organised for recall, not reference: repeated retrieval of code structure, table method drilled until it is automatic, and timed practice under the real shape of the sitting — 80 questions, three hours, nothing on the desk but the provided tables.
Independence, stated plainly. PassProfessor is an independent preparation provider, not affiliated with the Maine regulator or with Prov, and this program is not a Maine course. Completing it confers no license and no exemption; the state alone licenses, and candidates register for the examination through Prov’s channels.
Tell me when enrollment opens. The Maine Journeyman Plumber program is in the works and enrollment is not yet open. Leave an email address and PassProfessor will write to you when the program is ready — and only about this program. No date is promised, because the program will open when it meets the standard described above, not before.
Frequently asked questions
Which code edition is the Maine Journeyman Plumber examination based on?
The 2015 Uniform Plumbing Code, published by IAPMO. That is the tested edition named for the sitting, and it is the edition preparation should target.
Maine adopted the 2021 UPC. Why study the 2015 edition?
Because tested is not adopted in Maine. The 2021 UPC — adopted effective January 1, 2022 — governs work in the field, but the examination is still written to the 2015 edition, and candidates are marked against the 2015 text.
Is the Maine journeyman examination open book?
No. It is a closed-book examination. The one qualification is that the Maine Plumbing Tables, drawn from the 2015 UPC, are provided by the proctor at the sitting; candidates bring no code book of their own.
How many questions are on the examination, and how long is it?
80 questions, with three hours allowed.
What score passes the Maine journeyman examination?
70 percent.
What does the examination cost?
The examination fee is $65. That is the testing fee for the sitting, separate from any preparation program.
Who administers the examination?
Prov administers the Maine plumbing examinations; its candidate information bulletin names the reference set for the journeyman paper.
What references should I study?
The bulletin names three: the Uniform Plumbing Code 2015, the Maine Plumbing Laws and Rules 2016, and the Maine Plumbing Tables, 2015 UPC, which are provided by the proctor at the sitting.
What is the next license above journeyman in Maine?
Master Plumber. The master examination is a 100-question paper with a passing score of 75 percent.
Is PassProfessor affiliated with the State of Maine or with Prov?
No. PassProfessor is an independent preparation provider. The state alone licenses plumbers, and Prov administers the examination.
When does enrollment open?
The program is in the works and enrollment is not yet open. Leave an email address on this page and PassProfessor will write to you when the program is ready — and only about this program.