The OXY3E Iron Filters reduce staining, eliminate odors, and protect the plumbing system. This two tank oxidation system has a substantial air reserve to precipitate iron without a frequent backwash requirement. This saves on the amount of water used to clean the filter and the amount discharged to a septic or sewer system. It also allows for a long retention time for complete precipitation. These filters also have the ability to raise the pH of acidic water. A large fill port makes media replenishment very easy, if the raw water has a low pH. No air compressors or chemicals are required. The OXY3E Filters are equipped with an electronic control.