Review Keep drinking chemical and odor free water with a PUR water filter again. This pack of three replacement filters fits PUR Ultimate Water Filtration Dispenser and Pitcher. They reduce cadmium, cryptosporidium, Giardia, lead, mercury, asbestos, copper, zinc, and sediment 96-99,99 per cent more to reduce the chlorine levels and discoloration. PUR filters are made with activated carbon to reduce chlorine and sediment, and include an ion exchange resin that helps eliminate lead and copper. For best results, filters should be replaced every 40 liters. Although the PUR water filters remove many chemicals, dyes, and in bad taste, do not soften water or remove fluoride. This series of filters measures 7.9 by 7.6 by 2.