Almost 1 of every 5 plumbers, pipefitters, and steamfitters was self-employed. Jobs for plumbers, pipefitters, and steamfitters are distributed across the country in about the same proportion as the general population. Classroom subjects include drafting and blueprint reading, mathematics, applied physics and chemistry, safety, and local plumbing codes and regulations. On the job, apprentices first learn basic skills such as identifying grades and types of pipe, using the tools of the trade, and safely unloading materials. As apprentices gain experience, they learn how to work with various types of pipe and how to install different piping systems and plumbing fixtures.
Apprenticeship gives trainees a thorough knowledge of all aspects of the trade.
Although most plumbers, pipefitters, and steamfitters are trained through apprenticeship, some still learn their skills informally on the job. Applicants for union or nonunion apprentice jobs must be at least 18 years old and in good physical condition. Apprenticeship committees may require applicants to have a high school diploma or its equivalent. Armed Forces training in plumbing and pipefitting is considered very good preparation. In fact, persons with this background may be given credit for previous experience when entering a civilian apprenticeship program.