Protect your family's health and enjoy cleaner, better-tasting water in half the time. The PUR replacement water filter uses technology with granulated activated carbon and ion exchange for superior filtration performance and innovation. It is easy to use and change. Simply rinse the filter for 15 seconds and then twist it into place using the new LockFit™ top cap design. Remember to replace your water filter after 40 gallons of use or every 2 months. This convenient six-pack makes it easy to always have a PUR Pitcher Replacement Water Filter on hand.