Project Source PS-WHL-MB excels in reducing sand, soil, silt, sediment, dirt, and rust in your home's water supply. Highly efficient graded-density structure is designed to fit Project Source housings (PS-WHL-H), and provide protection in homes requiring higher flow rates (3 or more bathrooms). This "universal fit" filter can also be used in many other manufacturer's standard filter housings like AO-WH-PREL and WHKF-DWHBB, formerly availble from Lowe's. Used in the incoming water line to filter all of your home's water. In addition to filter options that specialize in particulate reduction, Project Source also offers designs to reduce sediment and improve taste.