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Concrete parts of rainwater inlets are designed for the drainage of surface water from paved areas to sewer networks. Rainwater inlets are manufactured in two dimensions DN 450 and DN 500. The range also includes slope inlets, which are designed to drain rainwater from terrain with a slope usually greater than 8%, from unpaved terrain or terrain with a large catchment area. The slope inlets are fitted with a large flat grating at the top and have an accumulation area for sediment.

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