Deep Sump Roof Drain
FD-4160GEX series of general purpose roof drains consist of a deep sump cast iron body with bottom outlet, a removable cast iron dome strainer, a membrane flashing clamp with integral gravel stop, adjustable extension sleeve and stainless steel perforated gravel guard.
Used in IRMA flat roof construction (inverted roof membrane assembly).The adjustable extension sleeve permits adjustment, easily accommondating different structural slab thicknesses until 26cm. The benefit of using the extension in this model is to connect the pipe with drain body out and under the slab making the maintainance works easier when using thick slab. The dome provides sufficient free area for quick drainage of rain water through the deep sump body and protects the drain and connected piping from the intrusion of debris. The Flashing clamp holds flashing and roofing materials securely to the drain body. The perforated stainless steel gravel guard is supplied to retain the crushed gravel used in IRMA flat roof construction.