pipefitters pipe Each plumber at the university received extensive training as an apprentice before becoming a licensed journeyman. They are responsible for all plumbing fixtures, including faucets, toilets/urinals, sinks, drinking fountains, sanitary/storm pump systems, and hot water heat exchangers. The plumbers also repair, maintain, and install de-ionized water and reverse osmosis water systems, safety shower/ eyewash equipment, and whole-building hot water mixing valves, along with domestic hot water heating systems