https://www.nyc.gov/site/buildings/industry/obtain-a-master-plumber-license.page
- Have at least seven (7) years of total experience* within the ten (10) years prior to application in the planning or design, and installation of plumbing systems under the direct and continuing supervision of a licensed Master Plumber in the United States; at least two (2) years of this required practical experience must be obtained as a Department of Buildings’ registered Journeyman Plumber