Assist the Journeyman or Master Plumber with replacing, installing or repairing all types of plumbing fixtures such as water closets, sinks, drinking fountains, showers, kitchen, laboratory, and other heating, water or drainage systems according to plumbing codes. Assist the Journeyman or Master Plumber with diagnosing malfunctions, repair and maintenance of plumbing and piping systems including clearing plugged waste lines.