The LORO-X DUOSTREAM cascade drainage system with multi-storey outlets drains the roof and all underlying roof terraces with only two collecting pipes (DUOSTREAM). One stream each for the primary drainage and one stream for the emergency drainage from the roof to the ground floor.

The first stream with multi-storey outlets without weir for the primary drainage drains the roof and the roof terraces into the ground pipe with high-performance safety overflow (HSÜ). The second stream with multi-storey outlets for the emergency drainage (with weir) drains the roof and the roof terraces to the outside onto a safely floodable area.

For the horizontal offset, two models of the Series 88 RAINSTAR-Distant multi-storey outlets are available: The model "Within the thermal insulation" routes the horizontal offset across the roof terrace within the thermal insulation. Alternatively, the model "Above the waterproofing membrane" can be selected when the horizontal offset is to be routed above the waterproofing membrane.

Alternative multi-storey outlets:

- With Series 43 Attika-Direkt (55mm engagement depth)
- With Series 88 RAINSTAR Distant (above or below the waterproofing layer)