1 OEM and ODM for all kinds of fire hydrant 2 DN 50, ... Product name: fire hydrant valveMaterial: made of cast iron.Inlet interface: 50mm/2inches; 65mm / 2.5 inches, 80mm/3 ... a connector to fire water supply with the valve interface, used for factory, warehouse, high-rise buildings, public buildings ... , with fire hoses and water gun or wait for equipment supporting the fire extinguishment.A fire hydrant ( ...