The invention relates to an apparatus for emptying water-conducting lines at risk of frost, comprising an emptying tube (4) and a riser pipe (15), the emptying tube (4) being arranged in the interior of the riser pipe (15), and the riser pipe (15) being configured in such a way that the riser pipe (15) can be connected to the lowest point of the water-conducting line, with the result that, in the case of connection to the water-conducting line (1), the emptying tube (4) is guided in the interior of the riser pipe (15) to the lowest point of the line system which is formed, and water can be removed from the line system via the emptying tube (4).Further aspects of the invention relate to a line system comprising an apparatus of this type, and to a method for emptying a line system of a pool.
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