Apprentice Plumbers work in a plumbing apprenticeship program under experienced Plumbers. An apprenticeship is required to become a licensed Plumber at the journeyman and master levels. The duties of an Apprentice Plumber are similar to those of the journeyman or master Plumber that the apprentice works under. You assess problems for clients and assist the Plumber in repairs. For new construction projects, Apprentice Plumbers assist with the installation of water, gas, and drainage piping for the whole building. You also learn about safety rules and governmental regulations. From small home plumbing repairs to large-scale installations, an Apprentice Plumber may do a range of jobs during your training.