CERTIFIED CLEANER: Reduces 72 contaminants including lead, PFOA/PFOS, chlorine, chloramine and cysts 3RD PARTY TESTED: Certified by IAPMO R&T Lab against NSF standards 42, 53, 372 and 401 FILTERED WATER MADE EASY: Low-maintenance system uses long-life filters with synchronized 1-year filter lives or 1100 gallons, and tool-free removal and changes take less than a minute (carbon & sediment filters included) EASY, DIY MAINTENANCE: Tool-free filter changes take less than a minute to replace each filter with a quick twist and lock mechanism. LCD display monitors and reports the status of your filters and battery life BEVERAGE FAUCET REQUIRED: A cold water beverage faucet is required to install the water filter system. Pair with Delta models: DWQ4001002-SS, 1930-DST, and 1960-DST in a coordinating finish