Under direct to general supervision, performs a variety of routine to complex duties in support of the Department, including semiskilled and skilled work in the repair and maintenance of the City's water and wastewater treatment plants, wells, lift and booster stations, storm drain stations, and related mechanical, electrical, hydraulic, and pneumatic equipment; and performs related duties, as assigned. Performs routine to complex maintenance and repairs of pumps, motors, drive systems and chemical feeders; cleans and maintains the boilers and related equipment; cleans and checks valves, bubbling lines, regulators, compressors, and filters; calibrates feeder systems and other plant equipment such as meters, pumps, valves and samplers.??.