Change your filter with just a few simple steps. Wash your hands before unwrapping the filter. Flush filter with cold water for 15 seconds. Insert filter into reservoir. Add cold tap water. Discard your first 3 pitchers of filter water, or use this water for plants. It is normal for carbon dust to appear in your first fillings. Fill up your pitcher and enjoy great-tasting water. Replace the water filter every 40 gallons or 2 months. Substances reduced may not be in all users water.