Water circulation for a device for shock-wave treatment, in particular a lithotripter, with a main circuit for heating the water and for filling and emptying a water cushion (WK) and for precise pressure regulation in the cushion, a flushing circuit and a pressure sensor (PR) on the water cushion (WK). According to the invention, the flushing is decoupled from the pressure regulation and filling of the water cushion. <IMAGE>
