Ability to: prepare written work orders and specifications; requisition supplies; read and interpret installation manuals, plumbing codes, blueprints, and construction drawings in order to determine the type, location, and configuration of plumbing systems; plan and sketch plumbing installations; annotate blueprints with updated plumbing configurations; estimate materials and time required to complete projects; apply knowledge of mathematics sufficient to size water supply systems, drain waste and vent, and lay out projects; safely lift construction materials and equipment; work on ladders and scaffolding and in confined building access areas. Install water supply, waste, steam, and gas lines and related fixtures and fittings in accordance with the plumbing code; review and interpret blueprints; design and layout plumbing systems; perform utility locating and documenting; cut, thread, weld or solder pipes; assemble and install valves, pipe fittings, insulation, and pipes; inspect for leakage; install sinks, toilets, bathtubs, water heaters, backflow devices, and other fixtures in accordance with applicable plumbing code.