In New Mexico the journeyman credential is a Journeyman Plumber certificate, designated JP, and there is no master plumber class in the state. The route examined through PSI under bulletin 814 has two parts that must each be passed at 75 percent: a written examination of 70 questions in 185 minutes, open book, examined on the 2021 Uniform Plumbing Code with the New Mexico Plumbing Code references layered on it, and a hands-on practical of seven projects scored out of 100 points in 120 minutes. The PassProfessor New Mexico Journeyman Plumber program prepares candidates for the written examination, and states plainly, from the first paragraph, that no written program can rehearse the hands-on practical. The companion guide is at /new-mexico-journeyman-plumber-exam-guide/.
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What this credential certifies
The Journeyman Plumber certificate — JP — is the instrument that carries journeyman authority in New Mexico. The holder is certified to perform journeyman plumbing work: installing, altering, and repairing water supply, drainage, waste, and vent systems, sizing pipe from drawings and from the building in front of them, setting fixtures, and testing finished systems so that water arrives clean and waste leaves without threatening the building or its occupants.
Two structural facts shape everything on this page. The first is what does not exist: New Mexico has no master plumber class, and candidates who arrive expecting an apprentice–journeyman–master ladder will look for a tier above JP that the state does not offer. The second is a neighbouring credential: the MM-1 contractor qualifying party (QP) examination belongs to the contractor side of licensing — a different credential, not the JP route. This page concerns the Journeyman Plumber certificate only.
New Mexico journeyman work runs from adobe and historic construction to desert subdivisions, through high-altitude freeze exposure, hard water, and long rural service runs. The certificate certifies that the holder’s judgement — code judgement and bench judgement alike — holds across that range, which is why the state tests both kinds separately.
The examination at a glance
| Item | Verified position |
|---|---|
| Program | New Mexico Journeyman Plumber: the JP certificate examination route |
| Credential | Journeyman Plumber certificate (JP). There is no master plumber class in New Mexico |
| Vendor | PSI, under bulletin 814 |
| Written examination | 70 questions / 185 minutes / 75 percent to pass / OPEN BOOK |
| Practical examination | 100 points / 120 minutes / 75 percent to pass / seven hands-on projects |
| Tested code | 2021 Uniform Plumbing Code (UPC), with New Mexico Plumbing Code (NMPC) references; where the NMPC and the UPC conflict, the state code overrides |
| Adopted code position | The 2024 NMPC — the 2024 UPC as amended — took effect August 1, 2026, but the examination references remain the 2021 edition. Tested does not equal adopted in New Mexico |
| Examination fee | $68.88 per exam, paid for the PSI sitting |
| Credential term | Three years |
| Continuing education | 16 hours per term for journeymen, of which at least 8 hours must be code |
| Distinct credential warning | The MM-1 contractor QP examination is a different credential — context only, not this route |
| Companion guide | /new-mexico-journeyman-plumber-exam-guide/ |
| Administrator note | PassProfessor is independent and is not affiliated with the New Mexico regulator or with PSI |
Two examinations, two kinds of competence — and a disclosure owed at the start
New Mexico does not certify a journeyman on a written paper alone. The written examination — 70 questions, 185 minutes, open book, passed at 75 percent — tests whether the candidate can find, read, and apply the code to described work. The practical examination — seven hands-on projects, scored out of 100 points in 120 minutes, also passed at 75 percent — tests whether the candidate’s hands can do what the code describes: measured, cut, joined, assembled, and finished work, performed in the room, under time.
The disclosure belongs here, not in small print at the end: a written preparation program cannot cover the practical. Reading about a joint is not making one. Timed written practice builds code fluency; it does not build the muscle memory, the sequencing, or the pace that seven projects in 120 minutes demand. Candidates must rehearse the practical the only way it can be rehearsed — with materials, tools, and a clock, in person, well before the sitting — and should treat any preparation that implied otherwise as misdescribing the New Mexico route. The bench work itself remains the candidate’s own, and planning for it is part of planning for this credential.
Because each part carries its own 75 percent standard, neither part rescues the other. A strong written score does not average away a practical shortfall, and strong hands do not excuse a written paper below the line. Preparation that funds only one part has funded only half the route.
The code position: tested on 2021, working under 2024
New Mexico presents the sharpest code-edition split in this catalog, and candidates must hold both halves at once. The adopted position moved: the 2024 New Mexico Plumbing Code — the 2024 Uniform Plumbing Code as amended for New Mexico — took effect on August 1, 2026, and it is the code that governs installation work in the state. The examination position did not move with it: the PSI references for the JP examinations remain the 2021 edition. Candidates are therefore tested on the 2021 UPC, with the NMPC references layered on it, even while the lawful code on the job has advanced to 2024.
The working rule is simple to state and easy to violate under pressure: in the examination room, answer from the tested edition; on the job, build to the adopted edition. A candidate who studies only the 2024 text answers some items from provisions the sitting does not use; a candidate who studies only 2021 and then installs to it has the opposite problem, in the field, where it costs more. Serious preparation is therefore bilingual in editions — fluent in 2021 for the sitting, aware of 2024 for the work — and this program is built in exactly that posture.
Inside the tested layer sits a second New Mexico rule: the examination references include the New Mexico Plumbing Code alongside the UPC, and where the NMPC and the UPC conflict, the state code overrides. That override rule is itself examinable judgement. When a scenario turns on a provision the state has amended, the credited answer follows the New Mexico text, not the model code text — and the candidate who never learned which provisions New Mexico amended cannot reliably tell when the override is in play.
What the written examination 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 UPC 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.
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.
Water heating and venting interfaces — examined as safe installation, temperature and pressure protection, clearances, and the controls that keep stored hot water from becoming a hazard.
Sizing and layout reasoning — examined as the habit that connects the written paper to the practical: reading a described system, choosing sizes from the code’s tables and methods, and checking the result against the building the item describes. The candidate who can size on paper is rehearsing, in written form, the first step of every practical project.
New Mexico amendments and the override rule — examined as state judgement: where the NMPC departs from the UPC text, which text governs, and how that answer changes in the provisions New Mexico has amended.
The route, in order
The route runs: confirm that the Journeyman Plumber certificate is the credential the work requires — JP, not the MM-1 contractor qualifying party route. Confirm eligibility through the state’s licensing channels. Schedule the examinations through PSI under bulletin 814, and pay the examination fee of $68.88 per exam. Sit the written examination — 70 questions in 185 minutes, open book — and reach 75 percent. Sit the practical examination — seven hands-on projects, 100 points in 120 minutes — and reach 75 percent there as well. Hold the certificate on its three-year term, and renew it with 16 hours of continuing education, at least 8 of them code hours, inside the term’s requirements. PSI administers sittings; it does not issue the certificate, and no preparation provider plays any part in that decision.
Staying certified: the three-year term and its sixteen hours
The JP certificate runs on a three-year term. Renewal is built on continuing education: 16 hours for journeymen across the cycle, with at least 8 of those hours required to be code hours. The composition matters as much as the total: 16 general hours without the code half does not meet the requirement as structured, because the state wrote the code minimum in deliberately — the credential’s centre is code competence. Holders who track the split from the term’s first year never face an end-of-term scramble.
What makes this route demanding
Three things, each specific to New Mexico. First, the dual standard: two sittings, two formats, each passed at 75 percent, with no averaging between them. Second, the edition split: the candidate sits an examination referenced to 2021 while the adopted code stands at 2024, so edition discipline — knowing which text governs which decision — is tested on every paper. Third, the override rule: New Mexico amendments displace the model code where they conflict, so generic UPC preparation that never opens the NMPC layer is incomplete preparation by definition. A candidate who funds bench time as seriously as book time, studies the tested edition deliberately, and learns the state layer as law meets the route as it actually stands.
What the PassProfessor program will cover
Built for the written examination, honest about the practical. Our catalog now includes preparation for the New Mexico Journeyman Plumber written examination, composed in two layers. The first layer is the tested code itself: original practice material written to the 2021 Uniform Plumbing Code — drainage and venting, water supply and sizing, traps and protection of the potable system — worked the way the open-book sitting works it, by finding and applying provisions under time. The second layer is the New Mexico delta: the NMPC references, the override rule where state and model code conflict, the two-part 75 percent structure, and the tested-versus-adopted edition split stated on every relevant item rather than left for the candidate to trip over. Every item is written from scratch against primary sources; no item is drawn from another provider’s material.
What the program does not do, stated in the same size type. It does not rehearse the seven practical projects. It cannot. Candidates receive a clear account of the practical’s verified shape — seven hands-on projects, 100 points, 120 minutes, 75 percent to pass — so they can organise real bench practice with real materials, and the program’s sizing and layout work supports the thinking the projects require. The making itself must be practised by hand.
Independence, stated plainly. PassProfessor is an independent preparation provider, not affiliated with the New Mexico regulator or with PSI, and this program is not a state course. Completing it confers no certificate and no exemption; the state alone certifies, and candidates register for examinations through PSI under bulletin 814.
Tell me when enrollment opens. The New Mexico 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 New Mexico called?
The Journeyman Plumber certificate, designated JP. That certificate is the instrument that carries journeyman authority in the state.
Is there a master plumber licence above JP in New Mexico?
No. There is no master plumber class in New Mexico. The ladder candidates know from other states does not continue above JP in that form.
Who administers the New Mexico journeyman examinations?
PSI, under bulletin 814. Candidates schedule and sit through PSI; the state issues the certificate.
What does the written examination look like?
70 questions in 185 minutes, open book, with a passing standard of 75 percent. It is examined on the 2021 Uniform Plumbing Code with the New Mexico Plumbing Code references layered on it.
What is the practical examination?
A hands-on examination of seven projects, scored out of 100 points in 120 minutes, with a passing standard of 75 percent. It tests performed work, not written answers.
Can a written program prepare me for the practical?
Not for the making itself. Written preparation builds the code knowledge and sizing judgement the projects draw on, but the projects must be rehearsed by hand, with materials, tools, and a clock. Any program implying otherwise misdescribes the route.
Which code edition is tested, and which is adopted?
Tested: the 2021 UPC, with NMPC references. Adopted: the 2024 NMPC — the 2024 UPC as amended — effective August 1, 2026. The examination references remain 2021, so candidates sit the earlier edition while the state builds to the later one.
When the NMPC and the UPC disagree, which governs?
The New Mexico Plumbing Code overrides. Where the state code and the model code conflict, the state text is the governing text, in the sitting and on the job.
What does the examination cost?
The PSI examination fee is $68.88 per exam. That is the testing fee, separate from any preparation program.
How long does the JP certificate last, and what does renewal require?
A three-year term. Renewal requires 16 hours of continuing education for journeymen, of which at least 8 hours must be code hours.
Is the MM-1 examination the same route?
No. The MM-1 contractor QP examination is a different credential on the contractor side of licensing. It is context for understanding the state’s structure, not a step on the JP route.
Is PassProfessor affiliated with the state or with PSI?
No. PassProfessor is an independent preparation provider. The state alone certifies journeyman plumbers, and examinations are administered through PSI.
Where can the fuller guide be read?
At /new-mexico-journeyman-plumber-exam-guide/, the companion exam guide to this program page, covering the credential, the two-part route, the code-edition split, 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.