The Culligan HF-360A Whole House System protects your appliances from sediment and scale buildup. The system features a clear housing so that you can easily see when your filter needs to be replaced. A P5 Premium cartridge is included. The perfect solution for: Coarse Sand, Dirt, Extra Fine Sand, Fine Sand, Rust, Sand, Scale, Sediment, SiltChange filters easily without shutting off water with built-in shut-off valveClear housing allows you to monitor cartridge useFilters all water entering your homeTraps sediment, reduces scale that can clog faucets and ruin plumbing