The Barberi DR-4 filters and magnetic dirt separators restrain the impurities contained in the system water through the combined action of their four inner components: decantation in the dirt separator, cyclonic filtration, filtration by cartridge, removal of ferromagnetic particles by means of an extractable magnet. Moreover, a manual air vent is installed on the top cover. They are used in air conditioning systems and central heating systems with wall-mounted boilers, solid fuel generators, heat pumps. In this way the system is protected, in particular the devices such as heat exchangers and high efficiency pumps contained in the generators. Thanks to the versatility of the connections, they can be installed vertically, horizontally and in 45° position.