Pumping station with efficiency increasing and backflow preventing structure

A pumping station comprising a structure which includes at least one inlet chamber and at least one discharge chamber for a liquid which is to be conveyed, said discharge chamber being arranged at a different height from said inlet chamber, a separating wall within the structure between the inlet and discharge chambers, and at least one pump for delivering a liquid through the separating wall into the discharge chamber, the discharge chamber having a discharge opening which is arranged at an angle to an open outlet opening of the pump, said discharge opening having an upper edge situated below a liquid level which prevails in a discharge arranged downstream of the structure, wherein the pump is provided with an upwardly directed, liquid-conducting device leading to the pump outlet opening, and said outlet opening is arranged in the discharge chamber above the upper edge of the discharge opening.