construction kit for a device for rückhalten of mischwasser

摘要

The invention relates to a retention system for combined sewage, which comprises an accumulation duct with overflow shaft and throttle shaft. The accumulation duct, the overflow duct and the throttle shaft comprise prefabricated plastic pipe portions. The overflow shaft has a double sill for overflow of the combined sewage on both sides or an annular sill for peripheral overflow of the combined sewage. Consequently, an easy-to-mount and compact type of construction, in particular with regard to the overflow shaft, is achieved. IMAGE