CBS-OPX-20 5GPM Consumables and replacement cartridges

Your water quality may affect the longevity and replacement frequency of the filters.
Prefilter - Recommended replacement every 6-12 months or as needed.
CBS Carbon Cartridge Replacement - Please refer to the specs for carbon cartridge capacity.
The OnliSoft media is non-absorbent and will work for a lifetime. This means that there are no replacements or maintenance required.