... storage tankStainless steel drinking water tap With LED display Stage 1:(PP)5 micron sediment filter, ... effective removing dirt, rust and sand particles .Stage 2:(GAC)Granular activated carbon cartridge ,it remove ... and reduce of tast ,odor and color.Stage 3:(CTO)Activated carbon block cartridge,remove chlorine ... and reduce of tats,odor ,and color.Stage 4:(RO)Reverse osmosis membrane ,thins film ...