Compatible to American Plumber WRC25HD20 Whole House 20-inch Heavy Duty Filter Cartridge by CFS Compatible to American Plumber WRC25HD20 Whole House 20-inch Heavy Duty Filter Cartridge by CFS Reduces fine sediment and chlorine taste and odor in residential and commercial drinking water Nominal filtration rating of 5 microns, Initial pressure drop at 5 gpm 5.5 psi Bonded PAC media with polyolefin pre-filter and polyethylene netting for extended life Chlorine reduction capacity 40,000 gallons at 4 gpm