Maintain the water distribution system through such activities as installing and repairing service lines, mains, and hydrants, cleaning storage tanks, lubricating and rebuilding pumps and control valves, operating system isolation valves, painting, repairing, and clearing snow from hydrants, collecting samples and flushing to maintain water quality, and assisting with the testing, repair, or replacement of meters and the thawing of frozen pipes. Metal locators and line tracers, video inspection equipment, leak detection equipment, atmosphere testers, respirators and SCBAs, manhole hoists, trench shoring and bracing, line freezing equipment, tapping machines, volt/amp meters, pressure and flow gauges.