Career LaddersRegistered Plumbing Apprentice
Register with the MA Plumbing Board, work under a master, log 8,500 hours over 4–5 years.
The honest version
This is the official path to a MA plumbing license. You register as an apprentice with the Board of State Examiners of Plumbers and Gas Fitters, get sponsored by a licensed master plumber, and start earning while you learn. MA requires 8,500 hours of supervised work experience PLUS 550 hours of classroom instruction at an approved school — typically 4 to 5 years total. There are two main tracks: (1) Union apprenticeship through a UA local (Locals 12, 4, 138, etc.) — paid wages climb every 6 months, free schooling, full benefits. (2) Non-union (open shop) apprenticeship at an independent shop — find a master to sponsor you, then enroll in a state-approved trade school yourself (Peterson School, North Bennet Street, Greater Lowell Tech, etc.).
You'll fit if…
- You can commit to 4–5 years of work + classroom
- You enjoy figuring out how systems connect, not just swapping parts
- You take notes and remember procedures
- You handle being the lowest-paid and least-experienced person on the job for years
Core skills
- Soldering and brazing copper
- PEX crimping/expansion and PVC/CPVC solvent welding
- Reading the MA State Plumbing Code (248 CMR)
- Sizing supply lines, drains, vents, and fixtures
- Roughing in residential bathrooms and kitchens
- Basic gas fitting (separate gas license track exists)
- Backflow prevention basics
Required certifications
Things that give you a leg up
- Union apprenticeship — paid school, raises every 6 months, pension and health from day one
- MassReconnect — free community college for adults 25+ without a degree (covers some plumbing programs)
- Vocational high school plumbing track (Worcester Tech, Greater Lowell Tech, Madison Park, etc.)
- Bilingual — service plumbers love apprentices who can talk to MA's diverse customer base
Learn more
- Apply to UA Local 12 (Boston), Local 4 (Roslindale), or Local 138 (Worcester) — intake is competitive and only opens periodically
- Call 5 open-shop plumbing companies and ask if they're sponsoring apprentices this year
- Look up Peterson School, North Bennet Street, and Greater Lowell Tech evening programs
- Apply for your MA Plumbing Apprentice License the day you have a sponsor lined up
Real talk before you commit
- You CANNOT skip the hours. The MA Board verifies them — falsified hours cost you the license forever.
- Open-shop apprentices have to find AND pay for their own school. Union pays for it. Factor that in.
- 5 years feels long when you're 22. It feels short when you're 50 and earning $90K+ as a journeyman.
- Gas fitting is a SEPARATE license in MA. Many plumbers get both, but you sign up for the gas track separately.