No.1 Set of butterfly pneumatic operated valve to be installed by yard in order to drain delivery line to water games and compensation tank after super-halogenations or at the end of daily service hours. Kit is composed of: No. 5 pneumatic operated butterfly valve DN50, wafer, power supply 24V 60Hz for delivery drain valve ZH/465AB-AC-AD-AE-AF No. 1 pneumatic operated butterfly valve DN80, wafer, power supply 24V 60Hz for surge tank automatic drainage ZH/465AG