... filterTo remove sand,dirt, worn and rust particles6 monthsGAC-Granular Activated Carbon Filter To Adsorb the Chlorine ,VOC Organic Matter,Odor ... ,Smell Turbidity6 monthsCTO-Block Activated Carbon To Absorb the chlorine, organic,odor,smell turbidity and ... mineral substance and dissolved matter and chemical12 monthsT33-Post Carbon Filter To absorb the odor,and adjust the taste6 ...