Key Facts
| Statutory basis | MGL c.142 |
|---|---|
| Administering agency | MA Board of State Examiners of Plumbers and Gas Fitters |
| Main divisions | 248 CMR 10 (plumbing) + 248 CMR 6 (gas) |
| Master Plumber License | Required for any plumbing work over $500 OR involving gas |
| Journeyman Plumber License | Works under Master Plumber supervision |
| Master Gas Fitter License | Required for any gas line work |
| Inspector | Local plumbing inspector + state board |
| Permit window | Required before work begins (typically issued 5-14 days) |
| Common violations | TPR discharge pipe, dishwasher air gap, dielectric union |
| Vacuum breakers | Required on outdoor hose bibs (248 CMR 10.14) |
| Expansion tank | Required on systems with backflow preventer (248 CMR 10.13) |
Related Sub-Entities
- 248 CMR 10 Plumbing Code — Water supply, drainage, vents, fixtures
- 248 CMR 6 Gas Code — Gas piping, appliances, venting, leak testing
- Massachusetts Master Plumber License — Statutory contractor license
- Massachusetts Gas Fitter License — Statutory gas fitter license
Codes — Related Pro Build Services
- Plumbing Services — MA Licensed Master Plumber covering all 248 CMR work.
- Gas Line Services — 248 CMR 6 compliant gas piping and installation.
- Leak Detection — 248 CMR-compliant leak diagnosis and repair.