This set is for home drinking water R.O. Systems as well as the Aquarium Dual systems that are also used for producing drinking water (the polishing filter is not used in straight aquarium systems).
Double Filter Set: This filter set will last Approximately 1 year. (2 Complete Pre and Post Filter Change) (2) high capacity sedimentary filters (SED); (2) high capacity granular activated coconut carbon filters(GAC); (2) high capacity coconut carbon block filters (CCB); AND (1) in line Post Carbon polishing filters (PC final filter for taste and odor).
R.O. MEMBRANE SOLD SEPARATELY