The United Association of Plumbers and Pipefitters (UA): 300,000 members of the UA work in the plumbing, pipefitting, refrigeration, and fire sprinkler industry in the United States and Canada.
UA Local 46: Represents plumbers, steamfitters and related workers in Toronto.
UA Training for Refrigeration Mechanics: Joint Training and Apprenticeship Committee (JTAC) website for UA Local 787. Specializing in training for Refrigeration mechanics.