www.waterfilters.net/Katadyn-Vario-Replacement-Pleated-Filter-Cartridge.html
The Katadyn Vario Replacement Filter is a 0.3 micron glass fiber element that is EPA certified for microbiological water purification. It should be replaced after 2,000 liters or when the flow becomes slow. For maximum pleated cartridge life, use the Katadyn Vario Microfilter in "longer life" mode, which produces one quart per minute.
