Wet Alarm Valves 2013 Features: Item no.: ZSFZ100, ZSFZ150, ZSFZ200 inlcuding pressure gauge,water motor gong ... pipes Wet alarm valve (Check valve) 1) Item no.: ZSFZ100, ZSFZ150, ZSFZ200 2) Nominal diameter: 100mm, 150mm, 200mmWet alarm valve (Check ... valve)1) Item no.: ZSFZ100, ZSFZ150, ZSFZ2002) Nominal diameter: 100mm ...