From Ryno
Ryno Sump Flange Rainwater Outlet Leaf Guard. Prevents the ingress of leaves and other debris into the rainwater outlet. Key Features: Sump increases the rate of rainwater flow into the drain Extremely cost-effective Suits all forms of flat roof Suitable for most applications Highly resistant to UV Highly resistant to ozone Highly resistant to other atmospheric and chemical agents Remains flexible, even at very low temperatures Application Suitable for use within wide temperature ranges, even very low temperatures For use in new build or refurbishment applications, for example, wide valley gutters The long downpipe is ideal for installation in deep roof slabs