Reverse osmosis Replacement membrane for Ecosoft reverse osmosis system and many more reverse osmosis systems 50 gallons per day capacity membrane Removes up to 98% of contaminants in water Filter needs replacing every 12-24 months Dimensions - 298mm x 44.5mm 5 stages of a reverse osmosis filter Sediment prefilter: A sediment prefilter screens out dirt, sand, rust and other microscopic particles 15 times smaller than a grain of sand. Carbon prefilter: An activated carbon prefilter reduces elements that cause water to taste and smell unpleasant, including chlorine. 2nd carbon prefilter: Another activated carbon prefilter reduces elements that cause water to taste and smell unpleasant, including the taste and odor of chlorine. RO membrane: The reverse osmosis membrane filters out dissolved solids, including radium, lead, arsenic, and many others. Taste and Odour filter: The T+O filter is a second activated carbon filter that polishes the water to make sure it's crystal clear.