Patent ID: 8470167

Claim:
A device for dosed transfer of filtered softened water into boilers of household appliances, said device comprising: a tank adapted to be filled with water, the tank having a lower opening; a double drain pipe having a vertical axis, formed of adjacent first and second conduits; a bowl having an upper opening and a bottom wall defining a drain hole; the double drain pipe being situated downstream said drain hole which is configured to be closed by a shut-off plate closable by return action of a spring; the shut-off plate being fixed at the top of the double pipe and having a central tubular body with a vertical axis; the central tubular body including an external circular flange at approximately half of its height defining the shut-off plate for closing the drain hole, an upper ending section, and a lower ending section; and a screened cartridge adapted to include a water softening agent, the screened cartridge closing the lower opening of the tank and being housed in a chamber defined by the bowl; wherein the upper ending section of the tubular body is inserted in a third conduit having a vertical axis that crosses the cartridge axially; the third conduit has a top ending with a nozzle that extends inside the tank; and the second conduit is coupled with the lower ending section of the central tubular body so that the second conduit is in communication with the third conduit.