Filling device (1, 101) including a reservoir (3, 103) intended to contain liquid, a valve (4, 104) connected to the reservoir and a spout (20, 120), in which the valve has a shutter (10, 110) and a shutter seat (11), a flow circuit having a liquid inlet adjacent to the shutter seat and a liquid outlet adjacent to the spout, the liquid outlet being located lower than the liquid inlet, and an air intake circuit separate from the flow circuit, in which a pushrod (22, 122) has an upper end adjacent to the shutter. The pushrod includes a first duct (27) and a second duct (28), the air inlet circuit including the first duct, the flow circuit including the second duct.