CLEARLY GREAT WATER - This filter cartridge reduces sediment, particulate, chlorine taste and odor, and parasitic protozoan cysts SANITARY REPLACEMENT - Sanitary Quick Change (SQC) design allows for fast and easy change-outs of this cartridge without having contact with the filter media. SQC design also means change-outs of this cartridge are simple - and don't require a wrench, just ¼ turn UNIVERSAL DESIGN - The universal system design allows for use on both chlorinated (municipal) and non-chlorinated (well water) systems SIX MONTH FILTER LIFE - To maximize system performance and efficiency, regularly scheduled maintenance, including replacement of the cartridge every six months (or sooner if a noticeable reduction in flow rate, change in odor or taste occurs) is required. Filter life is dependent on actual use and incoming water quality NSF STANDARD 42 AND STANDARD 53 CERTIFIED - Tested and certified by one of the world's most respected independent certification organizations that helps protect the world's food, water, consumer products, and environment, Weight: 1.10231131 pounds, Manufacturer: Aqua Pure