Pump assembly

A pump assembly comprising:

• a pump casing;
• an impeller rotatably arranged in the pump casing;
• an electrical drive motor connected to the impeller for selectively driving the impeller in two rotation directions;
• and
• a valve arrangement arranged in the pump casing and configured to switch a flow path downstream of the impeller between two exits formed in the pump casing, depending on a rotation direction of the impeller, the valve arrangement comprising a first movable valve element at a first of the two exits and a second movable valve element at a second of the two exits, wherein the valve elements in an idle position are each located in a closed position, in which the first valve element at least partly closes the first exit, and the second valve element at least partly closes the second exit, and the first valve element is movable into an opened position by way of a flow caused by the impeller in a first rotation direction, and the second valve element is movable into an opened position by way of a flow caused by the impeller in a second rotation direction, wherein the first valve element and the second valve element each comprise an opening, which permits a flow passage into the respective associated first exit and second exit even in a closed position of the respective the first valve element and the second valve element.