ION WATER MACHINERIES pioneer in mafacturing of world class iron removal plants and filters. We are using our patented oxidizing catalytic filtering media for reducing of iron in raw water. The iron filter how do work, when water enters the iron water filter, it passes through a bubble of compressed air that adds oxygen to it. The water then passes through a filter bed. The filter materials enhances a reaction that separates the iron from your water. The insoluble flakes of iron that result are then caught by the filter bed.