It is placed in the central supply. It has the ability to be joined with more filter cases giving a complete water treatment system of 2,3,4, 20, 2.5 etc stages. It has a sealing ring. Accepts polypropylene, activated carbon and other 0.5"xXNUMX" size filters on the market. It is indicated in cases where the height of the installation is ample (filter case height XNUMXm).