You become a journeyman plumber by logging supervised plumbing work experience — for most plumbers a 4- or 5-year apprenticeship — and then passing your state's journeyman exam, in the states that license journeymen individually.
There is no national hour count or single exam: each licensing board sets its own requirements.
This page is the route in brief: the requirements, the hours, the exam, the timeline and the no-apprenticeship path.
What are the requirements?
Becoming a journeyman plumber comes down to two requirements: documented, supervised plumbing work experience and — in the states that license journeymen individually — a passing score on the journeyman exam.
Everything else is local.
There is no national journeyman plumber licence: the hour and year requirements, the exam arrangements and even whether journeymen are licensed at all vary by state, so the rules that govern you are written by your state licensing board — or by your city or county, where plumbing licensing is local.
Where the classic rung exists, it sits in the middle of a three-licence ladder.
As of September 29, 2026, 24 jurisdictions have a statewide plumber licence with the classic apprentice/trainee → journeyman → master ladder (the count includes the District of Columbia).
In those places the board publishes the deal in one document: the experience threshold you must document, the exam you must pass and the application that ties the two together.
The rung is not universal, which is why the first step is a lookup rather than a leap.
Delaware's board issues only master-level licences — Master Plumber, Master HVACR and Master HVACR Restricted — with no state journeyman licence at all.
Confirm what your state, or your city, calls the journeyman level before you plan around it.
What the licence lets you do once you hold it — the day-to-day work, the legal scope, the pay — is the subject of our journeyman plumber guide.
No national numbers exist for this route
How many hours do you need?
The honest answer is that there is no single national number of hours.
Every figure you will find — including the ones below — is one jurisdiction's rule.
Boards count the requirement their own way: in years, in hours, or both, with their own rules for what substitutes and how the time is documented.
The hours themselves are supervised on-the-job time, logged while you work under a licensed plumber.
For most plumbers the container is an apprenticeship: BLS says most plumbers, pipefitters and steamfitters learn the trade through a 4- or 5-year apprenticeship combining 2,000 hours of paid on-the-job training a year with technical instruction, in programs sponsored by unions, trade associations and businesses.
One jurisdiction's number, stated exactly: in the District of Columbia, journeyman plumber/gasfitter exam eligibility is 4 years / 8,000 work hours.
Treat it as a worked example of how a board phrases the threshold, not as the trade's benchmark.
Your number is on your board's application, along with what it accepts in place of apprentice hours.
The state-by-state figures we verified are collected in our plumbing license requirements guide.
The journeyman exam in brief
The exam is the gate between your documented experience and the licence.
Where the state licenses journeymen individually, you sit it once the board has accepted your experience record — in the DC example, that means the 4 years / 8,000 work hours above.
What the exam covers, its format and even who runs it are state decisions.
The vendor varies: PSI delivers the state exams in states including Maryland, Massachusetts, Michigan and Washington; ICC appears as a city-level vendor — Philadelphia and Pittsburgh, for example, use ICC exams; and some agencies run their own testing, as Minnesota's DLI and Omaha's plumbing board do.
Each board sets its own content outline, and its candidate handbook is the only syllabus that counts.
One twist is worth knowing early: in the District of Columbia, the journeyman exam is waived with proof of completing a nationally certified apprenticeship.
That makes apprenticeship completion an exam substitute in DC's rules — and it previews the last section of this page.
The exams themselves — code content, formats, practical portions, prep — are a subject of their own.
Our journeyman plumber exam guide covers what the published outlines show.
The timeline from your first day
Day one looks nothing like the licence.
You start as a plumbing apprentice or helper, working under licensed plumbers while the supervised hours accumulate — the 4- or 5-year, 2,000-hours-a-year apprenticeship pattern most plumbers follow, per BLS.
The licence is the finish line of that stretch, not the start of it.
Start as an apprentice or helper
Paid plumbing work under licensed supervision — the years when the hours that qualify you are logged.Document your experience for the board
The application asks for the experience record the board requires — hours, years or both, evidenced the way the board specifies.Pass the journeyman exam where one is required
In the DC example, eligibility is 4 years / 8,000 work hours — and a nationally certified apprenticeship waives the exam entirely.Work at the journeyman level
Once the board issues the licence, the supervised-training stretch is behind you — and where a master licence exists, that rung is the next climb.
In the DC worked example the arithmetic is concrete: 4 years / 8,000 work hours to journeyman exam eligibility, and 8 years / 16,000 hours for the master.
Your state's numbers will differ, because boards set them — but the shape holds: years of supervised work first, the exam at the end of them.
For the whole climb from first helper job to master licence, including the stages either side of journeyman, our guide to how long it takes to become a plumber lays out the timeline.
Without an apprenticeship?
Most plumbers reach journeyman through an apprenticeship, but the route is defined by documented experience, not program membership.
The District of Columbia's rules show the two doors side by side: exam eligibility there is 4 years / 8,000 work hours of documented work, while completing a nationally certified apprenticeship is what waives the exam.
Read together, that describes a route open to a plumber who never enrolled in a program — the documented hours plus the exam — though the board's own application materials are the word on exactly who qualifies without one.
Florida law shows the same either/or in writing: a local journeyman licence there requires a proctored, board-approved journeyman exam (Block and Associates or another board-approved exam) passed with at least 75%, plus either a registered, state-approved apprenticeship or at least 12,000 hours of on-the-job training in the trade.
Do not generalize either door to every state.
Whether a board accepts unregistered work experience, how it counts non-apprentice hours and what proof it wants are its own rules, and they differ jurisdiction by jurisdiction — ask the board before you assume the door is closed.
If you are weighing the registered route instead, our plumbing apprentice guide covers what the job, the pay and the training look like from the inside.
Career information, not legal advice. Journeyman plumber requirements are set state by state — and by cities and counties where licensing is local. Confirm the current requirements with your state licensing board or local building department before you apply.