The cartridge filters are installed where water must be free of suspended substances such as sand, limestone flakes, and iron oxide. Once detached from the pipes, these substances damage or obstruct taps, shower heads and wall boilers. The ½’‘F20 filter, with a compact and attractive design, can be equipped with CL2 washable cartridges to be discarded in CCA2 wire-wrapped polypropylene, CC2 carbon and CX2 stainless steel.