The EcoLoop Saphir is a hydrodynamic separator. The special inlet geometry reduces possible turbulence and thus ensures an optimized, tangential water inlet. Nature served as a model here. The specially shaped inlet and the division into several chambers ensure optimized settling behavior and reliable retention of filterable substances (AFS). This is also confirmed by laboratory tests conducted by the independent testing institute PIA Aachen. The EcoLoop can be used both for discharge into surface waters and upstream of a retention facility.