Complete 4L Water Treatment System

No more pumping or chemicals needed. Simply set up the Sawyer water filtration system, and let gravity provide you with 4 liters of fresh, clean water in about 3 minutes. Each filter has a lifetime warranty as long as you follow the simple care and use instructions. Follow the helpful hints included in the directions for use. Backwashing is not required often unless you are filtering very turbid water. Backwashing only takes a few seconds. If you are accustomed to a ceramic filter, the leaning ratio is approximately 20:1. In other words, by the time you first need to clean your hollow fiber filter you would have neeeded to clean a ceramic filter 20 times. NO REPLACEMENT FILTERS OR CARTRIDGES ARE NECESSARY. We trust you will thoroughly enjoy the ease and extra protection this proven next generation technology offers you.The SawyerR Water Filters feature a 0.1 Micron Absolute Hollow Fiber Membrane, which uses medical technology developed from kidney dialysis. When the water is drawn through the filter, it flows through the side walls of the Hollow Fiber tubes. Sediment, bacteria, protozoa, cysts, and other contaminants are filtered out exceeding all applicable EPA recommendations. NO CHEMICALS, NO WAITING, NO PUMPING, NO WORRIES!Biological Filtration: SawyerR Water Filters offer the highest level of biological filtration available in the portable water filters category for removal of bacteria, E. coli, Giardia, and Cryptosporidium. SAWYERR WATER FILTER Removal rates: 7 Log Bacteria 99.99999%, 6 Log Protozoa Cysts 99.9999%