In Oklahoma the journeyman credential is the Journeyman Plumber licence, and there is no master class in the state. The trade examination administered through PSI is a single written portion of 85 questions in 180 minutes, open book, passed at 70 percent — 60 of 85 questions — with no practical and no drawing-production component in any portion. Unusually, the edition window is open: unlimited trade examinations currently test on the 2018 or the 2024 International Plumbing Code and International Fuel Gas Code while the system transitions to 2024 only, and the exact date the earlier edition retires is contested between PSI documents, so this page states none. The PassProfessor Oklahoma Journeyman Plumber program prepares candidates for that trade portion and the Oklahoma choices layered on it. The companion guide is at /oklahoma-journeyman-plumber-exam-guide/.
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 Oklahoma Journeyman Plumber licence certifies the individual plumber who installs, alters, and repairs plumbing systems to code: water supply and distribution, drainage, waste, and venting, fixture installation, and the fuel-gas piping interfaces the trade portion examines alongside the plumbing code. The holder’s work is the finished system inside the building and out to its connections — sized correctly, protected against contamination and trap failure, and built to the code edition the jurisdiction applies.
Oklahoma’s ladder is drawn simply, and two of its features deserve emphasis because candidates arriving from other states reliably misread them. The first is what does not exist: Oklahoma has no master class, and material written around a master step misdescribes the state. The second is a neighbouring examination that does not belong to this credential: PSI administers five portions across the Oklahoma licensing examinations, and one of them — Business and Law — is for contractors only. A journeyman candidate who funds study time for it has misread the map. This page concerns the journeyman trade portion only.
Oklahoma work runs from metropolitan construction in Oklahoma City and Tulsa to rural systems, storm exposure, and freeze events that punish shallow and exposed piping across the plains. The licence certifies judgement that holds across that range — and, in the present window, judgement about which code edition a given decision is being made under.
The examination at a glance
| Item | Verified position |
|---|---|
| Program | Oklahoma Journeyman Plumber: the journeyman trade portion of the Oklahoma licensing examinations |
| Credential | Journeyman Plumber. No master class exists in Oklahoma |
| Vendor | PSI |
| Trade portion | 85 questions / 180 minutes / OPEN BOOK / $92 per portion |
| Passing standard | 70 percent on the trade portion — 60 of 85 questions |
| Practical position | NO practical and NO drawing-production component in any portion. Isometric Analysis appears as 7 written items inside the portion |
| Tested editions | Edition window OPEN: unlimited trade examinations currently test IPC / IFGC 2018 or 2024, transitioning to 2024 only. The window is closing around December 2026 / January 2027; the exact retirement date is contested between PSI documents and NO exact date is stated |
| Adopted code | IPC 2024, effective September 14, 2026 |
| Portions warning | Five portions exist across the licensing examinations; Business and Law is contractors only — not this credential |
| State fees | Journeyman application $25 plus issuance $50, $75 in total; renewal $75, plus a $25 late fee where it applies |
| Continuing education | 6 hours per 36 months |
| Reciprocity | Arkansas is the ONLY named state, under an agreement effective October 21, 2024 |
| Companion guide | /oklahoma-journeyman-plumber-exam-guide/ |
| Administrator note | PassProfessor is independent and is not affiliated with the Oklahoma regulator or with PSI |
One written portion — and what is not in the room
Some states prove a journeyman twice, once on paper and once by hand. Oklahoma does not. The journeyman trade examination is a single written portion — 85 questions, 180 minutes, open book — and there is no practical component and no drawing-production component in any portion. Candidates should hear that as good news stated precisely, not as a licence to under-prepare: the absence of a bench sitting concentrates the whole verdict into the written paper, and the paper includes written isometric analysis — 7 items inside the portion — in which the candidate reads and reasons about isometric drawings on the page. Drawing literacy is examined; drawing production is not. Every study hour therefore belongs to code fluency, sizing and layout reasoning, and isometric reading, against a pass line of 60 correct answers.
The edition window: 2018 or 2024, closing toward 2024 only
Oklahoma’s defining feature in the present period is its open edition window, and this page handles it with the care the record requires. Unlimited trade examinations in Oklahoma currently test on either the 2018 or the 2024 editions of the International Plumbing Code and the International Fuel Gas Code, while the system transitions to 2024 only. The window is closing around December 2026 and January 2027. The exact date on which the 2018 edition retires is contested between PSI documents, and this page states no exact retirement date — because printing one would assert as settled a fact the primary sources themselves state inconsistently. Candidates with a sitting near the turn of the year should confirm the edition position for their own appointment through PSI directly, and should treat any secondary source that prints a single confident retirement date with suspicion.
Beneath the window sits the adopted position, which is not in doubt: Oklahoma’s adopted code is the IPC 2024, effective September 14, 2026. The state builds to 2024. The practical study rule follows from holding those two facts together: prepare deliberately for the edition you will sit, and know that the job will be inspected to 2024. A candidate sitting inside the window on the 2018 edition must answer the paper from the 2018 text, even where the 2024 text — now the adopted code — has changed a provision. A candidate who elects or is assigned the 2024 edition prepares from the adopted text itself. Either way, edition discipline is not a footnote in Oklahoma right now; it is the first decision of preparation, and it should be made explicitly, in writing, before the first study session.
What the trade portion covers
Drainage, waste, and vent systems — examined as the centre of the trade: drainage fixture units, sizing of drains and vents, slopes, cleanouts, traps and trap protection, and the venting methods the IPC permits, applied to described buildings rather than recited as lists.
Water supply and distribution — examined as water fixture units, sizing of building supply and distribution piping, pressure considerations, backflow protection, and protection of the potable system at every cross-connection a scenario can plant.
Fuel gas piping within the trade portion — examined through the IFGC alongside the IPC: the piping, sizing, and safety provisions that govern the gas side of the work the Oklahoma journeyman performs, tested in the editions the window currently offers.
Traps, interceptors, and indirect waste — examined as the barriers between the drainage system and occupied space: trap seals, prohibited arrangements, interceptor duties, and indirect waste where a direct connection would put water, food, or occupants at risk.
Fixtures and fixture fittings — examined as installation requirements, clearances, supply and flushing provisions, and the conditions the code attaches to each fixture type.
Isometric analysis — examined as 7 written items inside the portion: reading isometric drawings, tracing runs, and reasoning about the system the drawing represents. It is analysis on paper, not a drawing-production exercise, and it rewards candidates who practise reading drawings rather than only reading text.
Sizing and layout reasoning — examined as the connective skill of the portion: reading a described system, choosing sizes from the code’s tables and methods in the edition being sat, and checking the result against the building the item describes.
The route, in order
The route runs: confirm that the Journeyman Plumber licence is the credential the work requires — and set aside both the master tier Oklahoma does not have and the Business and Law portion that belongs to contractors only. Apply to the state: the journeyman application fee is $25. Schedule the trade portion through PSI and pay the portion fee of $92. Decide the edition question explicitly — 2018 or 2024, inside the open window — and confirm it for the actual appointment, because the exact retirement date of the earlier edition is contested and the window is closing around December 2026 and January 2027. Sit the portion — 85 questions in 180 minutes, open book — and reach the trade passing standard of 70 percent, 60 of 85 questions. On passing, the licence issues on payment of the $50 issuance fee, bringing the state’s application and issuance total to $75. Renewal is $75, with a $25 late fee where it applies, and the credential is maintained with 6 hours of continuing education per 36 months. PSI administers the sitting; it does not issue the licence, set reciprocity, or decide the edition window’s closing date.
A note on arrival from elsewhere: Arkansas is the only state named for reciprocity, under an agreement effective October 21, 2024. A plumber licensed anywhere else should expect no named reciprocity in Oklahoma and should plan on the examination route described here.
Staying licensed: renewal and the six hours
The journeyman licence renews at $75, with a $25 late fee where the renewal runs late — a small arithmetic lesson in renewing on time. Continuing education runs at 6 hours per 36 months: a light load, spread across a three-year cycle, and precisely because it is light it is easy to leave unattended until the cycle closes. The holder who completes the hours early carries no end-of-term risk.
What makes this examination demanding
Three things, each specific to Oklahoma in the present window. First, the concentration of the verdict: one written portion carries the whole route — 85 questions decide the matter, and 60 of them must be right. Second, the edition window itself: the same trade can currently be examined on either of two editions of two codes, the IPC and the IFGC, and the candidate must answer consistently from the chosen text while working in a state that has adopted the later one. Third, the isometric items: 7 written questions that test drawing literacy inside a text-heavy paper. A candidate who makes the edition decision deliberately, trains retrieval pace for an open-book three hours, and practises reading isometrics as a distinct skill meets the portion as it actually stands.
What the PassProfessor program will cover
Built for the trade portion as Oklahoma actually administers it. Our catalog now includes preparation for the Oklahoma Journeyman Plumber trade portion, composed in two layers. The first layer is the tested codes themselves: original practice material written to the International Plumbing Code and the International Fuel Gas Code — drainage and venting, water supply and sizing, fuel gas piping, traps and protection of the potable system, and written isometric analysis — worked the way the open-book sitting works it, by finding and applying provisions under time. The second layer is the Oklahoma delta: the open edition window handled honestly, with edition-tagged material so that 2018 preparation and 2024 preparation never blur into each other; the 60-of-85 pass arithmetic stated plainly; the contractor-only Business and Law portion fenced off from the journeyman route; the state fee structure; and the Arkansas-only reciprocity position. Every item is written from scratch against primary sources; no item is drawn from another provider’s material.
Edition honesty as a house rule. Because PSI documents state the earlier edition’s retirement inconsistently, the program states no exact retirement date and teaches candidates to confirm the edition for their own appointment. Material in this catalog that asserted a single closing date for the Oklahoma window would be asserting more than the record supports, and this program declines to do so.
Independence, stated plainly. PassProfessor is an independent preparation provider, not affiliated with the Oklahoma regulator or with PSI, and this program is not a state course. Completing it confers no licence and no exemption; the state alone licenses, and candidates register for examinations through PSI.
Tell me when enrollment opens. The Oklahoma 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
What is the journeyman credential in Oklahoma?
The Journeyman Plumber licence. It certifies the individual plumber for journeyman work in the state.
Is there a master plumber licence above it in Oklahoma?
No. No master class exists in Oklahoma. Material organised around an Oklahoma master tier misdescribes the state.
Who administers the Oklahoma journeyman trade examination?
PSI. Candidates schedule and sit the trade portion through PSI; the state issues the licence.
What does the trade portion look like?
85 questions in 180 minutes, open book, at $92 per portion. The passing standard for the trade portion is 70 percent — 60 of 85 questions.
Is there a practical or drawing examination?
No. No portion carries a practical or drawing-production component. Isometric Analysis appears inside the trade portion as 7 written items — drawing reading, not drawing production.
Which code editions are tested?
Inside the currently open window, unlimited trade examinations test on IPC and IFGC 2018 or 2024, transitioning to 2024 only. Oklahoma’s adopted code is IPC 2024, effective September 14, 2026.
When exactly does the 2018 edition stop being tested?
No exact retirement date is stated on this page, because PSI documents state the position inconsistently and the date is contested. The window is closing around December 2026 and January 2027. Candidates sitting near the turn of the year should confirm the edition for their own appointment through PSI.
Do journeyman candidates take a Business and Law examination?
No. Five portions exist across the Oklahoma licensing examinations, and Business and Law is for contractors only. It is not part of the journeyman route.
What do the state fees come to?
A $25 application fee plus a $50 issuance fee — $75 in total. Renewal is $75, plus a $25 late fee where the renewal runs late. The PSI portion fee of $92 is separate.
What continuing education does the licence require?
6 hours per 36 months.
Can a plumber licensed in another state transfer into Oklahoma?
Arkansas is the only state named for reciprocity, under an agreement effective October 21, 2024. No other state is named; plumbers licensed elsewhere should expect the examination route.
Is PassProfessor affiliated with the state or with PSI?
No. PassProfessor is an independent preparation provider. The state alone licenses journeyman plumbers, and examinations are administered through PSI.
Where can the fuller guide be read?
At /oklahoma-journeyman-plumber-exam-guide/, the companion exam guide to this program page, covering the credential, the edition window, the route, and a study plan in depth.
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.