The second method is non -reagent degreasing. The essence of this method lies in the cattle of the process of oxidation of the dissolved iron, the process occurs much faster than when defending, and the iron of their water is much more fully removed. In addition, the passage of water through a container with special granules-oxidizers practically does not slow down the water current in the tap and does not create inconvenience. Maintenance of the filter-emacurator consists in the banal washing of the filler from the rusty sediment settled on the surface of the granules.