Replacement purifier cartridges for the Grayl GEOPRESS are designed to last 350 cycles (65 gal / 250L). Lifespan will decline when purifying water with high levels of silt, sediment or tannins. Cartridge press time increases towards the end of the cartridge lifespan; when press time reaches 25-30 seconds, the cartridge should be replaced.Read more
Captures pathogens and inorganic contaminants like a magnet.
Ion Exchange and Actived Carbon
As dirty water is forced through the purifier media, ion, exchange permanently binds pathogens (i.e. virus, protozoa, bacteria). Activated carbon absorbs, chemicals, heavy metals, flavors, odors.