The hydrant pumper nozzle shall be of a nonthreaded design, compatible with (4" or 5" depending on hydrant) a Storz hose coupling. The hose nozzle shall be an integral part of the fire hydrant and must be furnished by the manufacturer or authorized distributor designated by the manufacturer. Storz adapters, will not be accepted. The nozzles and the caps for the nozzles shall meet the applicable requirements of NFPA 1963.