An industrial plumber does the plumbing inside plants and factories: the water supply, sanitary drainage, and fixture work a factory runs on, at plant scale.
It is the same trade BLS describes for homes and businesses, with factories in the definition — while the piping that may carry chemicals, acids, and gases is pipefitter and steamfitter work.
Here is the work, the systems, the handoff line, and what the pay data shows.
What is industrial plumbing?
Industrial plumbing is the plumbing side of the plant floor.
BLS publishes one combined occupation for the pipe trades — Plumbers, Pipefitters, and Steamfitters, SOC 47-2152 — so industrial plumbing is not its own occupation in the statistics; it is one setting within the trade.
BLS describes plumbers as installing and repairing water, gas, and other piping systems in homes, businesses, and factories, along with the fixtures such as bathtubs and toilets and the appliances such as dishwashers and water heaters connected to them.
The industrial plumber runs that same scope — water in, waste out, fixtures and connected equipment — inside factories and plants.
Where it borders the other pipe trades is on the process side.
BLS describes pipefitters and steamfitters as installing and maintaining pipes that may carry chemicals, acids, and gases, mostly in manufacturing, commercial, and industrial settings — settings that overlap the plumber definition's businesses and factories, which is why this page gives the handoff its own section below.
The setting is also what separates this lane from the building lane: where the commercial plumber works the non-residential building — offices, schools, hospitals — the industrial plumber works the plant.
If you are mapping the trade as a whole, the plumber career guide covers the trade's settings, licence ladder, and job-title map; this page stays on the plant floor.
Typical industrial plumbing systems
The plumber's lane in a plant is the facility's utilities: the water supply feeding it, the sanitary drainage and vents carrying waste out, and the fixtures and connected appliances the trade definition includes — scaled up from a household to a facility.
It is the same DWV-and-water-supply craft, sized and staged for a facility rather than a house.
The boundary sits where the fluid stops being water, waste, or gas for fixtures and becomes the process itself.
Pipes that may carry chemicals, acids, and gases are pipefitter and steamfitter work under BLS's breakdown, and steamfitters specialize in systems designed for liquids or gases at high pressure.
The United Association describes the steamfitter side concretely: fabricating, installing, maintaining, and repairing high-pressure systems that move steam, hot water, and other industrial fluids — including chilled water and compressed air — with work that includes welding, rigging, and hydrostatic and pneumatic testing.
The two scopes share the same settings — BLS puts factories in the plumber definition and manufacturing, commercial, and industrial settings in the pipefitter one — so where a site needs both, which scope a given joint falls under comes with the work.
One more rule shapes the terrain.
On construction work, OSHA's confined spaces in construction standard requires the employer to ensure that a competent person identifies all confined spaces in which one or more of the employees it directs may work, and identifies each space that is a permit space, before work begins (29 CFR 1926.1203(a)).
Confined-space rules are employer duties — verify them per site
Industrial plumber vs pipefitter
Between the two titles, the cleanest dividing line is what is in the pipe.
The plumber's scope is water, gas, and other piping systems plus the fixtures and appliances connected to them — BLS puts factories in that definition right alongside homes and businesses.
Pipefitters and steamfitters take the pipes that may carry chemicals, acids, and gases, mostly in manufacturing, commercial, and industrial settings, and the high-pressure side belongs to steamfitters.
So in a factory, a refinery, or a pharmaceutical plant, the sanitary mains, water supply, and fixture work are the plumbing lane; the process lines, steam, and compressed-air systems are the fitter lane.
Two honest complications.
First, the same federal data covers both: BLS has published no separate wage or outlook for plumbers only, pipefitters only, or sprinkler fitters only — they share one occupation code, so no federal number prices one title against the other.
Second, the titles overlap at the edges: BLS's example titles for the combined 47-2152 occupation include Industrial Gas Fitter — an industrial-flavored title inside the shared code, not a separate plumber or pipefitter series.
The trade-vs-trade breakdown — systems, licensing, and the switch between them — is our plumber vs pipefitter guide.
The fitter side of this same plant floor is our industrial pipefitter page.
Industrial plumber pay and schedules
Start with what the federal data cannot say: there is no "industrial plumber salary" line in BLS statistics.
The Occupational Employment and Wage Statistics program publishes one combined occupation — Plumbers, Pipefitters, and Steamfitters, SOC 47-2152 — and no separate wage or outlook for plumbers only, pipefitters only, or sprinkler fitters only, so an industrial slice of the trade is not published either.
Any table that prices "industrial plumber" on its own is not reading a BLS occupation line.
What the combined occupation shows, from OEWS May 2025: a median wage of $30.67 an hour, or $63,800 a year, with the 10th percentile at $21.22 an hour ($44,150 a year) and the 90th at $52.13 an hour ($108,420 a year).
For the full tables, see our plumber salary page.
The industry cut is where employers appear: the highest-paying industries for the combined trade by annual median are, per BLS, Electric Power Generation, Transmission and Distribution ($115,310), Petroleum and Coal Products Manufacturing ($106,550), and Pharmaceutical and Medicine Manufacturing ($105,800) — though these are small niches, not typical jobs.
For contrast, at plumbing, heating, and air-conditioning contractors (NAICS 238220), the combined occupation counted 330,570 jobs with a $63,010 annual median — a cut that covers plumbing and HVAC contractors together, mixes residential and commercial firms alike, and excludes the self-employed.
Both industry figures are OEWS medians for the same combined occupation in the same May 2025 release, and none of them — national or by industry — is an industrial-plumber wage; the trade is published as one line.
What the schedules side of this lane actually looks like — hours, overtime, and on-call patterns for plumbers — is our work hours and schedule guide's subject.
Union density is part of the same picture: BLS counted union membership at 16.4% among wage-and-salary workers in construction and extraction occupations in 2025, with 17.4% represented by unions, against 12.5% in installation, maintenance, and repair occupations — though BLS publishes no union rate for plumbers specifically.
Our plumbers and pipefitters union guide covers how UA membership works.
Outlook is published for the combined trade too: employment is projected to grow 6.8% from 2025 to 2035, with about 42,000 openings a year on average — above the 3.5% all-occupation average.
How to get into industrial work
The move into industrial work is learning the trade, then steering your hours toward the contractors that staff industrial projects.
The steps:
Learn the trade
Most plumbers, pipefitters, and steamfitters learn their trade through a 4- or 5-year apprenticeship with about 2,000 hours of paid on-the-job training each year plus technical instruction, per BLS. Our plumbing apprentice and how-to-become guides cover the entry routes.Get licensed where your state licenses
Licence requirements for plumbers come from your state licensing board — or the city or county where licensing is local. The ladder, and who sets each rung, is our plumbing license guide's subject.Build plant-side hours
Take your hours with mechanical and plumbing contractors that staff industrial projects — that is how facility-scale sanitary and utility hours accumulate, on the same sites as the pipefitter scope above.Learn the handoff line
Welding, rigging, and hydrostatic and pneumatic testing are the steamfitter side's work, per the UA's own description of it. Knowing where your scope ends keeps you on the right side of the boundary the section above draws.Consider the union route
How UA membership and its apprenticeships work is our plumbers and pipefitters union guide's subject.
When you are ready to work, the plumbing job listings are the place to start.
Career and pay information, not legal or licensing advice. Requirements, safety rules and wages vary by state, city and employer — confirm what applies to you with your state licensing board, or the city or county where licensing is local, before you make a decision.
Licensing is state and local — confirm before you plan