United Association of Journeymen and Apprentices of the Plumbing and Pipefitting Industry of the United States and Canada (UA)

The UA represents approximately 370,000 skilled tradespeople in North America and Australia. More than 50,000 of its members are Canadian. UA tradespeople include plumbers, pipe fitters, sprinkler fitters and service technicians. They install, remodel or maintain systems that carry water, steam, air and other liquids or gases necessary for sanitation, industrial production, and heating and air conditioning.


In the late 1800s, plumbers, steamfitters and gas fitters were generally associated with independent local unions that catered to a variety of trades. In 1889, many of these unions began to focus solely on one kind of trade, inspiring the need for the UA. The UA’s first general president, P.J. Quinlan, is credited as first acknowledging the presence of the UA and setting the foundation for the union’s role in strike aid, building apprenticeships and worker treatment.


The trade(s) that are represented by this union include:


Canadian Headquarters

225 Metcalfe Street

Suite 600

Ottawa, ON K2P 1P9



(613) 565-1100



International Website