Waterdrop Gravity-fed Water Filter System, Reduces Lead and up to 99% of Chlorine, NSF/ANSI 42&372 Standard, with 2 Black Carbon Filters and Metal Spigot, King Tank Series, WD-TK-ALarge capacity: The Waterdrop King Tank gravity fed water filter system is a home water filtration system and comes with a 2. 25 gallon large capacity, thereby meeting water demands of a family of 4 people for pure water indoors and outdoors. Outstanding filtration: The filter media adopted in the King Tank is natural coconut activated carbon, which effectively reduces chlorine and improves taste. You can get up to 99% of chlorine reduction (Tested by