Abstract: A device for the dosed transfer of filtered softened water inside boilers of household appliances includes a tank, a cartridge including a water softening agent, a double drain pipe with vertical axis.

Abstract: The present invention relates to a device for the dosed transfer of filtered softened water inside boilers of household appliances, comprising a tank (1), a cartridge (2) that contains a water softening agent (3), a double drain pipe (11) with vertical axis, formed of an adjacent pair of conduits (15 and 16) and situated downstream a drain hole (6) closed by a shut-off plate (7) normally closed by means of the return action of a spring (13).

Abstract: Filtering device for filtering the air taken in by a cleaning apparatus, comprising a container provided with a plurality of walls. The walls define at least a first containing compartment, able to contain a first filtering element and in which the air to be filtered is able to be introduced through an inlet pipe, and a second containing compartment, able to contain a second filtering element and connected to the first containing compartment by means of an intermediate pipe, and from which the filtered air is able to exit through a discharge pipe. The two containing compartments are disposed on inside the other, so that the innermost containing compartment is at least partly surrounded by the filtering element contained in the outermost containing compartment.