Under sink filters: 1.Standard 5 stage RO system 2.Standard filter ,buy and ... tankStainless steel drinking water tap With LED display Stage 1:(PP)5 micron sediment filter,it's ... effective removing dirt, rust and sand particles .Stage 2:(GAC)Granular activated carbon cartridge ,it remove 99 ... chemicals,and reduce of tast ,odor and color.Stage 3:(CTO)Activated carbon block cartridge,remove chlorine ...