Inspects, tests, maintains, repairs, and replaces all indoor lighting fixtures, outdoor lights affixed to buildings, lighting controls, lighting timers, emergency lights, dimmers, ballasts, and hard-wired remote control systems. Maintains, repairs, and replaces potable water systems made from metal or plastic, including piping and related supports, fixtures such as faucets and toilets, fittings, pumps, hot water tanks, valves, meters, controls (e.g.