Whirlpool WHA4BF5 Large Capacity Carbon Whole Home Replacement Water Filter Reduces sediment, chlorine taste and odor, sand, silt and rust Carbon block filter provides better tasting water throughout your home 25 Micron filter  the lower the micron rating the more particles or contaminants removed by a whole house filter Universal fit - guaranteed to fit all major brands of large capacity size whole home water filtration systems including Whirlpool, Omni, Culligan, Watts, Filtrete, 3M, GE, and DuPont NSF certified - 3rd party tested for contaminant removal, efficiency, and structural integrity