![Grayl GeoPress Purifier Cartridge Orange](http://www.walkaboutoutfitter.com/cdn/shop/products/2592-613342-0-image-1186668_640x640.jpg?v=1706181997)
Replacement purifier cartridges for the 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. Cartridge continues to protect, even as press time increases.