The invention relates to a shut-off device for filling a container with a liquid, the shut-off device (1) comprising: - a housing (2) including a valve (3) for enabling a liquid flow through a liquid path (4) provided within the housing (2); - a control element (5) for opening the valve (3) in order to enable a liquid flow through the liquid path (4); and - a closing mechanism (6) for automatically closing the valve (3) dependent on the liquid level within the container; wherein the closing mechanism (6) comprises a deflector portion (6.1) arranged within the housing for receiving a liquid jet, said deflector portion (6.1) being coupled with a lever (6.2), said lever (6.2) being operatively coupled with the valve (3), wherein the shut-off device (1) further comprises liquid jet variation means (7) configured to vary the force of the liquid jet applied to the deflector portion (6.1) depending on the liquid level within the container and wherein the lever (6.2) is configured to control the valve (3) based on the force of the liquid jet applied to the deflector portion (6.1).