Wet Alarm Valve, alarm valve,fire fighting equipment Size:4'', 5'', 6'', 8'' material: ductile cast iron Nom. W.P.: 16BARS Wet Alarm Valve, alarm valve,fire fighting equipmentFeatures:1 ... ")3)material: ductile cast iron4)Nom. W.P.: 16BARS Wet Alarm Valve, fire fighting equipment