Culligan CW25-BBS Filter Cartridge, 25 Micron, White N/A Imported The CW25-BBS polypropylene wound heavy duty filtration cartridge works in Culligan model HD-950A whole house filtration systems Perfect for residential homes, helps protect appliances and pluming from sediment and scale Features a flow rate of 8 GPM and filter life of 5 months/20,000 gallons (depending on usage and water conditions) Reduces: sediment, rust, scale, dirt, coarse sand and sand The HD-950A housing has been tested and certified by WQA against NSF/ANSI Standard 42 for materials saferty and structural integrity Micron rating of 25 (the smaller the micron rating, the smaller size patricle the cartridge will filter) Compatible with Culligan model HD-950A 25 Micron heavy duty sediment filter cartridge Polypropylene wound, more effective on well water Cartridge life of 5 months, 20,000-Gallons Reduces sediment, scale, rust, dirt, coarse sand, sand, fine sand, extra fine sand, silt Extra whole house filtration of medium sediment particles