Performs routine replacement and repair of plumbing and steamfitting equipment and installation of new equipment, according to layouts provided by the supervisor, by cutting, fitting, and threading pipe; removing existing pipes and fixtures; repairing and adjusting water mixers, thermostats, and other fixtures; locating and unplugging stoppages; repairing domestic steam equipment such as steam tables, dishwashers, and laundry equipment; repairing leaks in steam and water lines; overhauling vacuum pumps; and insulating steam lines. Performs semiskilled carpentry activities including repairing doors, windows, window sashes, storm windows, stairs, railings, furniture, locks, and door hardware; operating shop machinery to make and assemble bookcases, shelves, tables, trenches, signs, and modular furniture; erecting and moving partitions; building forms for concrete work; and, under supervision, assisting in erecting and renovating buildings and structures.