Gravity BeFree Water Filtration SystemNever pump your filtered water again, with the Katadyn Gravity BeFree Water Filtration System. Lightweight and easy to use, simply fill the bag with settled water, hang it up and let gravity do the work. A pleated glass fiber filter element removes bacteria, protozoa and cysts from drinking water, including Salmonella, Colibacillosis, Vibrio cholera, Amoeba, Schistosoma (Bilharziasis), Giardia, Cryptosporidium, etc. Hands free gravity filter fill and