Do you see a clear glass of water, or water in a bath tub, turn orange in colour if you leave it standing for some time? If yes, you likely have elevated levels of "clear water iron" in your water. Clear Water Iron (or Ferrous Iron) occurs naturally in many well waters. Rainfresh CAFO948 Chemical-free Iron Filter removes Iron from all the water in the house including bathrooms, kitchen, laundry and even outside taps. Based on the technology of oxidation and filtration, Rainfresh CAFO948 filter converts dissolved iron (ferrous iron) in the water to a filterable rust particle (ferric iron), which it then filters out to give you clear, iron-free water.