The invention relates to a device for discharging liquid from a tank, having a line section which is formed on a tank-side end region for a fluid connection with the tank and which line section comprises a discharge opening on a discharge-side end region lying opposite the tank-side end region, a feed unit for gas which is provided on the line section and via which gas can be introduced into the line section, a line shut-off valve for shutting off the line section and which is provided on the line section between the tank-side end region and the discharge-side end region, and a residue removal line which branches off at a branch-off from the line section and runs at a run-in back into the line section, whereby the branch-off is arranged between the tank-side end region and the line shut-off valve on the line section, and whereby the run-in is arranged between the line shut-off valve and the discharge-side end region. It is provided according to the invention that the feed unit for gas is designed to feed pressure gas into the line section. The invention further relates to a method for emptying the residue of a line section which can be carried out with the device according to the invention.