Mroz v United Association of Journeymen and Apprentices of the Plumbing and Pipe Fitting Industry, Local Union No 488, 2012 CanLII 52665 Share on LinkedIn September 18, 2012 | Alberta Labour Relations Board Overview This action involved a duty of fair representation complaint against the United Association of Journeymen and Apprentices of the Plumbing and Pipe Fitting Industry of the United States and Canada, Local Union No. 488 by a former employee. CanLii 2012 CanLII 52665