A method for expanding plastics material parisons into plastics material containers by a liquid medium, with at least one transforming station, which fills and expands the plastics material parisons with the liquid medium, wherein at least one pressure generating device delivers the liquid medium to at least one filling device, which filling device fills the plastics material containers with the liquid medium, wherein the pressure generating device has a pressure output which at least at times is fluidically connected to the plastics material parison to be filled, wherein the apparatus has a removal device which at least at times removes a flowable medium from a plastics material container, wherein the pressure generating device has a suction intake which at least at times is fluidically connected to this removal device in order to remove the flowable medium.