The paper introduces an algorithm for a level dependent real-time control of sewage pump stations and states results from its evaluation based on a spectrum of simulations for three different catchments of the Berlin drainage system. The objective of the control function is to smooth the delivery of the pumps towards the wastewater treatment plant during storm weather events by throttling the flow and implicitly activating inline retention capacities of the sewer networks. The article comprises the definition and functioning of the control concept as well as operational constraints and boundary conditions and the derivation of optimal control parameters. The simulation-based evaluation of the concept shows that it is possible to manage available inline storage volume by applying the control function. However, only if an adequate retention volume of around 50.0 m³/ha Aimp or more is available a significant improvement of the flow characteristic towards the wwtp is possible.