Installs, repairs, replaces and maintains water lines, airlines, gas lines, vacuum lines, sewer lines, acid drain lines, sump pumps, sewer ejectors, domestic water pumps, water heaters, piping, traps, valves, vents, washbowls, sinks, toilet fixtures, fittings, faucets, drains, special laboratory sinks, drain tables, experimental tables, kilns, forges, basil valves, plug valves, acid neutralizer, condensate drains, roof drains, water filters, drinking fountains, decorative fountains, expansion tanks and associated underground utilities. Required to have visual acuity to perform an activity such as: operating machines such as lathes, drill presses, power saws and mills where the seeing job is at or within arm's reach; performing mechanical or skilled trades tasks of a non-repetitive nature such as ones by carpenters, technicians, service people, plumbers, painters, mechanics, etc.