Cation exchange resin is sometimes used to give these filters metals reduction capabilities. Ceramic filters can be combined with granular activated carbon or even carbon blocks, by encasing the media inside the ceramic outer shell. Filter Styles Filters can be configured in many ways, depending on their specific application. Plumbed-in filters are directly inserted into residential piping. Axial flow filters consist of a tube containing the filter media, which is most often granular activated carbon.
Water flows through the media inside the tube.
These filters are inexpensive and are typically used to reduce chlorine and sometimes large particles. Head and sump filters consist of a permanent filter head and a permanent or disposable sump containing the filter media. The media can take a variety of forms, including granular activated carbon, carbon block, or carbon coated paper, depending on the application. Point of entry filters are large, high capacity, high flow rate head and sump filters that are plumbed-in so that all or most of the water entering a residence passes through. The media vary according to the application.