... rod, copper ring fire hydrant, indoor fire hydrant, fire hydrant valve1.conventional ... type: SN50, DN50; SN65, DN652.pressure reducing&stablizing type: SNW65-I, DN653.revolving type: SNZ65, DN654.revolving and ... fire-fighting equipment in factories, warehouses, high-storey buildings, public buildings, ships, etc.It is usually complete with fire hoses and nozzles. fire ...