Maintains, repairs, inspects, installs and replaces plumbing systems, pipes, fittings and fixtures to maintain the heating, water, gas and drainage systems. Cuts, bends, threads and fits pipes with adjoining pipe assemblies. Repairs leaks and clears clogged drains. Installs sinks, showers, toilets, water heaters and related plumbing fixtures. May replace tile, replaster or paint walls through which holes have been made to gain access to plumbing. Interprets blueprints and works from sketches or verbal instructions. Performs all work in accordance with established safety procedures. May operate HVAC systems as needed.