control valve 1.More reliable open method 2.Manual function 3.Keyboard locking 4.LED dynamic color screen,bright and visual Multi-function ... be unlocked before operation.4. LED dynamic color display screen, bright and visual5. Single tank control valve, no water discharge when ... filter, RO and UF membrane housing, RO system, Accessories(valve, distributor, tank head, etc.) We have 7 years OEM ...