A jet regulator or jet aerator is provided with a jet regulator housing insertable into a water outlet and detachably held therein by threaded or bayonet connection. The jet regulator housing has an outflow-side housing partial region with a reduced housing outer circumference compared to the inflow-side housing partial region, and the outflow-side housing partial region is insertable into an insert opening of a turning tool such that the turning tool can be applied to a tool working surface in a rotationally fixed manner. The tool working surface is provided on the outflow-side frontal edge, the housing circumference of the outflow-side housing partial region and/or an annular shoulder surrounding the housing partial region on the outside. A sanitary water outlet is also provided, which for a plurality of visibly separately emerging water jets has a corresponding plurality of water outflows spaced apart from one another.