Stage 1 Sediment filter‎:‎This 10‎"‎ 5 micron sediment filter is made of 100% pure polypropylene fibers‎.‎ High capacity filter removes dusts‎,‎ rust ‎,‎ sand‎,‎ fiber‎,‎ bacteria‎,‎ insects‎,‎ algae suspended particles and rusts‎.‎Stage 2 Granular Carbon filter‎:‎This granular activated carbon filter is composed of high‎-performance activated carbon that removes 99% chlorine‎,‎ odor‎,‎ organic contaminants‎,‎ pesticides and chemicals that contributed to taste and odor‎.‎Stage 3 Block Carbon filter‎:‎Carbon block remove any additional organic substance and chlorine by‎-product as cancer causing THMs‎,‎ without release of carbon fines‎.‎Stage 4 Ultra‎-Filtration Filter‎:‎This stage uses a 0.1 micron thin film composite membrane‎.‎ This semi permeable membrane will effectively take out TDS‎-total dissolved solids‎,‎ salts‎,‎ heavy metals such as arsenic‎,‎ copper‎,‎ nitrates‎,‎ and lead‎,‎ as well as bacteria ‎.‎Stage 5 Carbon inline filter‎:‎T33‎,‎ 12‎"‎ In‎-line CAC Coconut filter is used to remove dissolved gases‎,‎ bad taste and odor from product water‎.‎ This is the polishing stage before consumption‎.‎