Abstract: A device for enabling an aerosol valve designed to be crimped in the neck of a can to operate both upsidedown and the rightway up, the device being designed to be placed between the inlet end fitting of the valve and a dip tube, and comprising two chambers (11, 12) in series and aligned on the axis of the valve. The chambers are interconnected by a channel (13) having an opening into each of said chambers, and also being in communication with the suction zone (17) of the valve. Each chamber includes a gravity-operated non-return valve member for engaging the corresponding channel opening, with each non-return valve member occupying a closed position when the corresponding channel opening is in the bottom of the corresponding chamber. The chamber which is closer to the valve (1) is also in communication with a zone (18) outside the valve and close to the valve via the end of the chamber which is opposite to its channel opening.