Whole House Iron and Manganese Water Filters efficiently removeremove up to 10 ppm of both ferric (oxidized) and ferrous (clear) iron and 5 ppm of manganese. Whole house Filter contains 3 stages: * In Stage 1, water goes through a 20" sediment filter * In Stage 2,water travels through a 1.5 or 2.0 cubic foot media tank with an Automatic Microprocessor Control valve. It will reduce Manganese and Iron * In Stage 3, water goes through a 20" solid carbon cartrige. Poly Glass mineral tank Riser style 1" internal flow distributor. Solid state microprocessor with LED displayElectronics control valve 12.0 gallon-per-minute flow rate. 3/4" or 1" Stainless Steel Bypass Valve. Contains Fleck microprocessor which is used to set up backwashing cycles. We have 2 systems available - 1.5 cu. ft. and 2 cu.ft. The difference is that the second system will last 25% longer. 2 cu.ft., Capacity: 12" x 52"