To prevent hydraulic overloading of sewer systems and the connected sewage treatment facilities, rain retention systems must be created. These have the task of buffering the mixed water that drains away in considerable quantities in rainy weather and throttling it on. Suitable technical solutions have been found to protect the following facilities, which ensure in a safe manner that constant runoff quantities are ensured in the run-off of a rain congestion system. Only such a measure leads to the desired result that the flow rate remains constant regardless of the accumulation height of a rain retention system.
The Electrical Flow Regulator Type EGAR was developed precisely for these requirements.