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 ... (4"),125mm(5"),150mm(6"),200mm(8")3)material: ductile cast iron4)Nom. W.P.: 16BARS Wet Alarm Valve, fire fighting equipment ...