The American Plumber WGC478 is a granular-activated carbon filter cartridge. This American Plumber WGC478 filter cartridge reduces contaminants like dirt, chlorine, rust, sand, sediments, and salt. Also, this American Plumber WGC478 filter cartridge eliminates bad taste and odor. This product is also known as the American Plumber 155110-51 water filter. It is recommended to replace your filter cartridge every 3 months to maintain its efficiency. This water filter is used in standard water filtration housings with 5" x 3" filters. This American Plumber filter cartridge is just one of the many amazing products manufactured by the American Plumber that you can purchase from PlumbersStock.com, which is the perfect place to shop when looking to complete any residential or commercial project.