Michigan Master Plumber
Department of Labor & Economic Growth (Builder's Unit):
517-241-9254
Department of Labor & Economic Growth - Electrical Division:
517-241-9320
Department of Labor & Economic Growth - Mechanical Division:
517-241-9325
Department of Labor & Economic Growth - Plumbing Division:
517-241-9330
Department of Labor & Economic Growth - Boiler Division:
517-241-9334
Department of Labor & Economic Growth - Elevator Division:
517-241-9337