Selects size and type of pipe and related material according to job specifications; inspects work sites to determine presence of obstructions and to ascertain that holes will not cause structural weakness; plans sequence of installation to avoid obstructions and activities of other construction workers; cuts, threads and bends pipe; assembles and installs a variety of metal and nonmetal pipe fittings, including those made of brass, copper, lead, glass and plastic; joins pipe by means of threaded, caulked, soldered, brazed, fused or cemented joints; secures pipe to structure with clamps, brackets and hangers; installs and maintains refrigeration and air-conditioning systems including compressors, pumps, meters, pneumatic and hydraulic controls and piping; test piping system for leaks. reaching in all directions, handling and manipulating objects and materials; coordinating the movements of eyes, hands and fingers to operate tools and equipment; lifting 30 to 50 pounds from ground level, waist level, and/or overhead; carrying objects, tools, equipment, etc.