GPA Mechanical Piping of NY is a Local 638 Steamfitting Contractor performing work for private and commercial concerns in both repairs and new contract work. Piping Installation-Removals-Repairs-Equipment Replacement Riser replacement/installation Chiller Plants, Boilers, Cooling Towers, Radiators, Generators, PRV Stations, H.P. Steam, Emergency Repairs, X-ray Welding (in shop or field), valves, a/c units, h/v units, Coils, pumps, oil tanks, heat exchangers Pipe fabrication