For over 85 years, Culligan knows every drop of water flowing through your home is important and is an expert in home water filtration systems. Provide your family with visibly clean, great-tasting water for drinking, cooking and more. The Culligan P5 4-pack Fine Filtration cartridge reduces sediment, rust, scale, coarse sand, sand fine sand, extra fine sand and silt. The replacement cartridge is designed for use in following Culligan model filter housings: HF-150A, HF-360A, HF-360B, WH-S200-C, HF-160, HF-365 and most standard size housings. The filter is recommended for use with city and well water supplies. The cartridge life is up to 2 months or 8,000 gallons.