Carbon and sediment filters are important parts of what makes up a typical multistage system. The four core components of a typical multi-stage system are the sediment Filter, Carbon Filter, RO Membrane and DI Resin. Filter maintenance is extremely important to keep your purification system running like new. Window Cleaning Resource offers filters for a variety of systems from brands such as XERO, Tucker, IPC Eagle, and Ettore. Enjoy fast and easy shipping on every order!