The United Association of Journeymen and Apprentices of the Plumbing and Pipe Fitting Industry of the United States, Canada and Australia (UA), affiliated with the national building trades, represents approximately 370,000 plumbers, pipe fitters, sprinkler fitters and service technicians in North America and Australia. The “UA”, as it is commonly known is a multi-craft union whose members are engaged in the fabrication, installation and servicing of piping systems.