Water filtration system 1.Standard 5 stage RO system 2.Food grade material Water resource:tap waterWater pressure:0. ... , rust and sand particles .Stage 2:(GAC)Granular activated carbon cartridge ,it remove 99% of the chlorine and organic chemicals,and ... tast ,odor and color.Stage 3:(CTO)Activated carbon block cartridge,remove chlorine and organic chemicals and reduce of tats,odor ...