The water filter cartridge is not included with the housing. This allows you to purchase the best water filter for your water supply. The water filter cartridge life depends on the water filter cartridge purchased, the quality of your water, and the amount of water used. You will know when to change the filter cartridge when your water pressure drops. Sediment water filters reduce dirt, sand, silt, sediment, rust particles, and scale particles. Choose from one of our sediment water filters at the 10" L x 2.5" W Standard Filter Page. Drinking water filters produce healthier, better-tasting drinking water by reducing chlorine taste and odor and other contaminants. Choose from one of our carbon drinking water filters at the 10" L x 2.5" W Standard Filter Page. Housing: Styrene Acrylonitrile (Clear). Cap: Reinforced Polypropylene. O-Ring: Buna-N. Button Assembly: 300-series Stainless Steel, EPDM, and Polypropylene.