Job Purpose: Maintains the flow of water, air, and other gases, and drainage by assembling, installing, and repairing pipes, fittings, and plumbing fixtures. Duties: * Produces plumbing systems by establishing standards and procedures; measuring results against standards; making necessary adjustments. * Determines sequence of installations by studying building plans and working drawings. * Identifies obstructions to be avoided by inspecting structure. * Locates position of pipe and pipe connections and passage holes by marking structure, using ruler, level, and plumb bob. * Accommodates pipes and pipe fittings by cutting openings in floors and walls, using hand tools and power tools.