Yes — you can train in both HVAC and plumbing.
Both trades' classroom tracks are published side by side, and the federal industry category combines them: NAICS 238220, "Plumbing, Heating, and Air-Conditioning Contractors."
Registration and licensing are where it narrows — our research could not confirm a registered program that trains both trades, and no state licensing file we checked issues a single licence covering both full trades.
Here is how dual training works and when it pays off.
Can you train in both HVAC and plumbing?
Start with how the training landscape is organized.
The federal government's industry classification for these shops is NAICS 238220, "Plumbing, Heating, and Air-Conditioning Contractors."
A contractors' association with both trades in its name — PHCC, the Plumbing-Heating-Cooling Contractors Association — offers apprentice content for each: its Educational Foundation's PHCC Academy runs online plumbing and HVACR apprentice courses, and NCCER, the curriculum publisher ABC's programs work with, publishes four-level curricula for both trades.
Where it narrows is registration.
Registered apprenticeships are built around specific occupations — an apprenticeable occupation must involve at least 2,000 hours of on-the-job learning — and our research did not confirm any registered program that trains both trades at once.
So the question for any sponsor is concrete: which trade would I register in, and how would the other get learned?
That is a per-program answer only the sponsor can give.
Keep training and licensing apart, too.
Training in both trades does not by itself license you to do either trade's work — that authorization is a separate layer, set by state boards and, where licensing is local, by city and county offices.
If you are starting from zero and mapping the plumbing side first, our guide to how to become a plumber lays out the full route from helper to licensed plumber.
Training vs licensing — keep the two apart
Programs that teach both trades
Registered apprenticeship is a paid route into either trade, and the federal floor is the same in both: at least 2,000 hours of on-the-job learning, programs that may be time-based, competency-based or a hybrid, and a progressively increasing wage schedule tied to skill.
The Department of Labor recommends — but does not federally require — at least 144 hours of related technical instruction per year.
Finish a registered program and you earn a completion certificate from the registration agency, which is a credential, not a licence.
The classroom layer is where the two trades sit closest together.
PHCC Academy, the PHCC Educational Foundation's online platform, offers apprentice courses in plumbing and in HVACR, and each course equals one year of related instruction at 156 hours.
NCCER, the curriculum publisher ABC's programs work with, publishes four-level curricula for both trades — HVACR (6th edition, revised 2022) and plumbing (5th edition, revised 2022) — and both comply with DOL apprenticeship standards.
The same two training organizations, in other words, publish both trades' tracks.
What our research did not confirm is whether any single registered program near you trains both trades at once — chapter-level program availability by trade is exactly the kind of local detail the national descriptions do not settle.
If a "plumbing and heating apprenticeship" is what you are after — the combined label in the industry's federal category, "Plumbing, Heating, and Air-Conditioning Contractors" — the practical move is to ask the sponsor two questions: which trade your apprenticeship registers in, and how the shop structures work in the other.
Our PHCC apprenticeship guide walks through that association's route in detail.
- Which trade would I be registered in, and under whose program?
- Does this shop work both trades, and would I rotate through both?
- Can coursework in one trade count toward the other's requirements?
- What does the state licensing board actually count toward exam hours?
Licensing implications for dual-trade work
Licensing is where dual-trade plans meet the fine print: none of the state licensing files we checked issues a single licence covering both full plumbing and full HVAC.
The combinations that do exist sit at the edges — a broader mechanical discipline here, a combined gas-fitting licence there, a residential scope in one state.
The examples below come from the state licensing sources we reviewed; they are illustrations of the variety, not a national pattern.
- Delaware — two master licences. The Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners issues only master-level licences: Master Plumber, Master HVACR and Master HVACR Restricted. A Master HVACR licensee also needs a Master Plumber licence to work on water supply and drainage pipes — the plumbing half of a dual-trade career there means a second master licence.
- Iowa — discipline licences. Iowa issues master licences in plumbing, mechanical, HVAC-refrigeration and hydronic, and journeyperson licences in those plus sheet metal. The mechanical licence spans HVAC, refrigeration, sheet metal and hydronic work — several mechanical disciplines in one, but plumbing is not among them.
- Washington, DC — a combined plumber/gasfitter licence. The Board of Industrial Trades licenses plumbing and gasfitting at apprentice, journeyman and master levels, including a combined plumbing/gasfitting licence. Journeyman exam eligibility is 4 years / 8,000 work hours and master is 8 years / 16,000 hours; the journeyman exam is waived with proof of completing a nationally certified apprenticeship.
- Maryland — gas fitting under the plumbing board. The Maryland State Board of Plumbing licenses Apprentice, Journey and Master Plumber/Gas Fitters, alongside separate Apprentice, Journey and Master Natural Gas Fitters; apprentices must be at least 16. There, the combination on offer is plumbing plus gas fitting, both under the State Board of Plumbing.
- New Jersey — one bond, two boards. After passing the exam, a New Jersey master plumber must file a $3,000 surety bond under N.J.S.A. 45:14C-26, and one bond can serve both the plumbing and HVACR boards — a small administrative break for licensees working across both.
- Oregon — combination business licences. The Building Codes Division offers combined business licences such as Plumbing and Boiler Business, and Plumbing and Boiler Business and Limited Maintenance Specialty Contractor HVAC/R (PBH), with one application, one renewal and one licence number.
- South Carolina — residential scope. A residential builder licensed by examination may perform residential specialty work — including plumbing and HVAC — without separately obtaining a residential specialty contractor licence. Here, both trades' specialty work sits under one licence, and it reaches residential work only.
Read those examples as a range: Delaware separates the trades into two master licences, South Carolina's residential builder licence covers both trades' specialty work within a single residential scope, and Oregon's combination business licence ties the plumbing and HVAC/R sides together at the business level.
Where your state lands decides whether dual training converts into dual work — and whether it is worth starting the second trade's own licensing path.
Confirm the rule with the board that issues it
Hiring and pay value of dual-trade training
Start with what the wage data actually shows, because it does not show a dual-trade premium.
BLS's OEWS survey puts the national median at $63,800 per year ($30.67/hour) for plumbers, pipefitters and steamfitters (SOC 47-2152) and $61,010 ($29.33/hour) for HVACR mechanics and installers (SOC 49-9021), both from May 2025, released May 15, 2026.
In the same survey's industry cut, NAICS 238220 — the category that covers plumbing and HVAC contractors together — the medians land close too: $63,010 for plumbers, pipefitters and steamfitters (330,570 employed) and $60,030 for HVACR mechanics and installers (297,290 employed).
OEWS counts employees, not the self-employed.
Our research holds no verified statistic that isolates what dual-trained technicians earn.
What the numbers do support is that the two trades' medians sit close together — nationally and inside the combined industry — so the case for dual training is not "the second trade pays more."
The verifiable value is structural.
In Delaware, where the plumbing side of an HVACR master's work takes a separate Master Plumber licence, holding both licences is how that work gets done at all.
And apprenticeship training can pay off at the licensing board itself: DC's Board of Industrial Trades waives the journeyman plumber/gasfitter exam with proof of completing a nationally certified apprenticeship.
The honest answer to "is it worth it" is that it depends on your state's licence map and your local market, not on any national pay gap.
Compare the trades' pay state by state with our HVAC vs plumbing pay guide, or go straight to the tables at plumber salaries and HVAC technician salaries.
And if you run a shop instead of training for one, our guide to hiring plumbers covers the employer side.
Career and pay information, not legal or licensing advice. Apprenticeship standards are set by each program sponsor and registered with the U.S. Department of Labor or a State Apprenticeship Agency; licensing is set by state boards and, where local, by city and county offices. Confirm current requirements with the authorities named above.