On-Tap Replacement FilterReduces impurities and has an added layer to trap sediment. All that's left behind is healthier, great-tasting water. Reduces lead, cryptosporidium, giardia, TTHMs and VOC (substances reduced may not be in all users' water). Replace every 100 gallons or four months, whichever comes first. Each filter saves up to 750 bottles of water. White. Water Filters Type: Faucet Filter; For Use With: Brita® Faucet Filter System.