A residential and a commercial plumbing apprenticeship sit on one federal floor: registered programs must pay a progressively increasing wage schedule, and a time-based program requires at least 2,000 hours of on-the-job learning.
What the setting changes: the buildings you learn in, the supervision above you and, in some states, how your hours map to licence tiers.
BLS's wage data cover the trade as one occupation; our research found no wage split between the settings.
The three settings: service, residential new construction and commercial
Plumbing is one trade across all of them.
BLS describes plumbers as installing and repairing water, gas and other piping systems in homes, businesses and factories, including fixtures such as bathtubs and toilets and appliances such as dishwashers and water heaters.
What an apprenticeship setting decides is the work you train on: service — the repair and maintenance of existing systems; residential new construction — installing systems in homes as they are built; and commercial — systems in businesses and factories.
Most of the trade works for contractors.
In 2025, 65 percent of plumber, pipefitter and steamfitter jobs were with plumbing, heating and air-conditioning contractors and 8 percent were self-employed, out of 510,600 total jobs including the self-employed (BLS OOH).
The industries employing the most plumbers, pipefitters and steamfitters in May 2025 (OEWS) were building equipment contractors — 340,140 jobs, a group that also includes electrical contractors — then utility system construction at 14,960 and local government excluding schools and hospitals at 11,480.
Whether you are after new construction plumbing apprentice jobs or a seat with a service shop, the plumbing apprentice jobs board is where to start looking, and the employer's line of work tells you the setting before the interview does.
HVAC apprentices face a version of the same decision under different labels — install versus service — and both sides of it show up in the demand BLS describes for that trade: commercial construction, including data centers, and residential construction are both expected to drive HVAC employment growth.
Whether you picture a residential HVAC apprenticeship or a commercial one, the first fork our guide to picking your first HVAC track covers is install versus service.
What each setting is like day to day — repair calls versus build stages, hourly crew pay versus sold work — is the service-versus-construction question, and it has its own comparison at Service Plumber vs New Construction Plumber.
For where the settings lead once you are licensed, the plumber career guide maps the trade's roles.
What you learn in each setting
Start with what does not change.
Whatever kind of plumbing apprenticeship you join, a registered program must provide at least 2,000 hours of on-the-job learning if its terms are time-based — terms can also be competency-based or a hybrid — and the Department of Labor recommends a minimum of 144 hours of related technical instruction per year without requiring it.
Most plumbers, pipefitters and steamfitters learn the trade through a 4- or 5-year apprenticeship with typically 2,000 hours of paid on-the-job training plus technical instruction each year, under sponsors that include unions, trade associations and businesses.
The classroom layer is the sponsor's, and the sponsors' published figures carry no setting split: UA apprenticeships are registered with the U.S. Department of Labor and include 2,000 hours of paid on-the-job training per year plus 216 hours of related classroom instruction; PHCC Academy's online plumbing and HVACR apprentice courses each equal one year of related instruction at 156 hours; and ABC builds its craft training on curricula from its educational affiliate NCCER.
Whether any sponsor runs a setting-specific curriculum is not something our research confirmed, so ask what the classroom covers before you join.
The on-the-job layer is where the setting actually reaches you: the systems you handle are the ones your employer's contracts bring in.
Supervision is one thing the registered standards must spell out — a program's standards have to state a numeric apprentice-to-journeyworker ratio, and while the federal rule sets no specific number, some state licensing laws set their own.
Alabama is one: one journeyman or master may supervise up to five apprentices on residential jobs but no more than three on non-residential ones.
The same apprentice can therefore work under tighter supervision in one setting than another, depending on the state.
The federal floor is fixed — states and sponsors add the rest
Pay and hours by setting
The honest answer first: BLS's wage data cover plumbers, pipefitters and steamfitters as one combined occupation (SOC 47-2152), and our research found no separate wage for residential vs commercial or service vs new construction work.
No UA or PHCC apprentice percentage ladder was verified in our research either; each local JATC or program sponsor sets its own.
Nothing we verified names an apprentice wage by setting, so the safe comparison is the wage schedule in each program's registered standards.
What is identical in every setting is the pay rule.
Registered programs must pay a progressively increasing schedule of wages consistent with skill acquired, with an entry wage not below the FLSA minimum wage where it applies — and 29 CFR 29.5 sets no percentage steps, so those come from each program's standards or a collective bargaining agreement.
Apprentices earn less than fully trained plumbers, pipefitters and steamfitters, and their pay increases as they learn to do more.
Whether the steps come from a JATC's agreement or a merit-shop sponsor's standards is the union vs non-union question; either way, get the wage schedule in writing before you accept.
The trade-wide anchors, all May 2025 (OEWS): plumbing helpers (SOC 47-3015), the closest federal category to entry-level work, earned a median of $20.36 an hour or $42,360 a year.
BLS publishes no starting-pay statistic, so the closest proxies for entry-level plumbing pay are the combined trade's 10th percentile — $21.22 an hour ($44,150 a year) — and 25th percentile, $24.13 an hour ($50,190).
The full trade's median was $30.67 an hour ($63,800 a year).
Our plumbing apprentice salary page shows the trade-wide (SOC 47-2152) figures — there is no apprentice-only series — the apprentice plumber pay guide covers the raise ladder, and the plumber salary tables show the licensed endpoint.
A published cut by employer type does exist — industry, not setting.
Median annual wages for the combined trade in May 2025 ran $71,660 in government (excluding state and local education and hospitals), $65,770 in manufacturing, $63,270 in heavy and civil engineering construction and $63,010 in plumbing, heating and air-conditioning contractors.
And on Davis-Bacon federal construction jobs, an apprentice can be paid below the posted journeyworker rate only if individually registered in a DOL- or state-registered program, with rates expressed as percentages of that rate per the registered program — and an apprentice working above the allowed ratio, or not registered, must be paid the full wage-determination rate for the work performed.
Hours follow the work.
BLS says most plumbers, pipefitters and steamfitters work full time, including nights and weekends, and plumbers are often on call for emergencies.
How on-call duty is distributed across the settings is not something our sources quantify — no primary source we checked gives typical rotations or calls per night, so it varies by shop: ask how the rotation works before you take a service seat.
Switching later: moving between settings
Completing a registered apprenticeship earns a certificate issued by the registration agency — the DOL Office of Apprenticeship or a recognized State Apprenticeship Agency.
What our research did not confirm is how hours transfer if you change sponsors or settings mid-program; that is decided by the programs and the registration agency involved, so ask both before you move.
Our registered apprenticeship guide explains what registration guarantees.
Some states draw a residential line into the licence ladder itself.
Colorado licenses plumbers statewide through its State Plumbing Board (DORA), at three levels — Residential Plumber, Journeyworker Plumber and Master Plumber — with experience requirements of 2 years (3,400 hours), 4 years (6,800 hours) and 5 years (8,500 hours) respectively; our research did not confirm what work each Colorado tier permits, so that is a question for the board.
Louisiana issues a Residential Plumber licence requiring 3,000 hours as an indentured apprentice in an LWC-approved program or 4,000 hours as an unindentured registered apprentice, working under a licensed master — the board describes the tier as repairing existing plumbing in one- and two-family dwellings.
If you train residential and later want commercial scope, what each tier permits, and whether your hours count toward the broader one, is the licensing board's call; our plumbing licence guide explains the ladder, and the board has the final word.
Whichever seat you start in, the trade rewards the same things: logged hours and clean work, plus whatever licence your state requires.
Career information, not legal advice — confirm apprenticeship and licensing rules with your program sponsor and your state licensing board before you act on them.