Plumbing Apprenticeships in New Hampshire: Programs, Requirements and How to Apply

Plumbing is a licensed trade in New Hampshire — apprentice, journeyman and master, all under the OPLC Mechanical Licensing Board — so the apprenticeship and the license are two separate boxes to tick.

The apprenticeship itself registers with the U.S. Department of Labor's Office of Apprenticeship, whose Concord office covers the state; OPLC's rules require the completed apprenticeship agreement to carry the Department of Labor's signature, and nationally, registered programs are registered either by DOL's Office of Apprenticeship (directly or through state field offices) or by a recognized State Apprenticeship Agency acting for DOL.

The registration runs through the federal office; the board's role is licensing, and its apprentice application must include the DOL-signed agreement.

The routes the research confirmed are UA Plumbers & Steamfitters Local 131, whose 5-year program covers plumbing, pipefitting, steamfitting and HVACR, and licensed plumbing employers that employ apprentices of their own.

The state packet's program standard is 8,000 hours of on-the-job training plus 144 hours of related classroom instruction per year — ask any sponsor how its program maps to it.

Yes, twice over.

All plumbing apprentices must hold an apprentice license/ID card from the Mechanical Licensing Board, and the application must include the apprenticeship agreement signed by the Department of Labor.

The fee is $88 as of September 2026, charged at application and again at each renewal, and the card renews every two years — but only while you remain enrolled in the apprenticeship and its trade-related education.

The apprenticeship registration itself runs through the Office of Apprenticeship, not the board.

Supervision is scripted too: an apprentice works under a licensed master plumber's direct supervision for the first 2 years and under general supervision after that, and in New Hampshire law a master plumber is the person or business that employs plumbers or does plumbing as a business.

The union path the research confirmed in New Hampshire is UA Plumbers & Steamfitters Local 131, whose apprenticeship is a 5-year regimen of classroom study and on-the-job training covering plumbing, pipefitting, steamfitting and HVACR.

Applications are accepted January 1 to May 30, and classes start in September.

Nationally, the United Association says its apprenticeships are registered with the Department of Labor, typically last five years, and cover plumbing, pipefitting, HVACR, welding and fire protection.

Local 131 is the only New Hampshire plumbing local whose program the research verified — check the local's apprenticeship page for current intake details.

The research could not verify a SMART (sheet metal) local program serving New Hampshire either; SMART is a union, so ask any of its locals that covers the state directly.

On the merit-shop side, our research could not verify a registered apprenticeship program run by a New Hampshire ABC or PHCC chapter — the sites we tried did not resolve — so treat that as a research gap rather than proof none exists, and ask the chapters directly.

Nationally, ABC describes itself as founded on the merit shop philosophy, and PHCC delivers apprenticeship content through its online learning academy.

What New Hampshire clearly provides is the employer route: licensed plumbing employers can employ apprentices — no more than 2 per licensee — and the apprenticeship registers with the Office of Apprenticeship.

Employers have a duty when you leave, too — the business must notify the board within 30 days if a plumber apprentice severs employment.

New Hampshire's own standard is 144 hours of related classroom instruction for every year of the apprenticeship; federally, the Department of Labor recommends that same 144 hours a year but does not mandate it.

For the classroom side, OPLC's apprentice packet names the PHCC National Association's online home-study plumbing course alongside Manchester School of Technology, Granite State Trade School and Advanced Trade Schools as related-instruction resources — the packet's contact details may be stale, so confirm current offerings with OPLC or the schools.

Classroom hours matter beyond graduation: the in-state journeyman route requires at least 600 hours of plumbing education alongside the apprenticeship completion certificate and the on-the-job hours.

One more classroom note: a plumbing apprentice who also holds a registered fuel gas trainee license accrues field hours for both concurrently, and OPLC's board-approved fuel-gas training providers include Manchester Community College, The NH School of Mechanical Trades, HUOT Center and UA Local Union 131.

Start by picking a door.

For the union program, apply to UA Local 131 between January 1 and May 30; classes start in September.

For the employer route, apply to licensed New Hampshire plumbing contractors — the apprenticeship that results registers with the Office of Apprenticeship.

Then file for the Mechanical Licensing Board apprentice license — the application must include the DOL-signed apprenticeship agreement, and the $88 fee applies at application and each renewal.

Expect the federal floor: registered apprentices must be at least 16 unless a higher minimum age is set by law (New Hampshire's own minimum age did not surface in our research — ask the sponsor), there is no federal maximum age and discrimination against applicants 40 or older is barred, sponsors can set their own qualifications on top, probation cannot exceed 25% of the program length or 1 year, whichever is shorter, and pay follows a progressively increasing schedule the federal rule leaves to each program's standards.

Completion earns a certificate from the registration agency — not a trade license.

If you are torn between the union hall and an independent contractor, our guide to how to get a plumbing apprenticeship walks through the decision.