Marketing InformationSioux Chief 868 series cast iron large capacity main roof drains shall be used where necessary in drainage systems. Roof Drain shall have a low profile cast iron dome strainer and cast iron gravel guard. Strainer shall turnto-lock into gravel guard. Cast iron drain body shall have no-hub connection. Designed in accordance with ASME A112.6.4 Used on any type of flat roofs. Low profile dome prevents debris from entering the drain line. The anchor flange and membrane clamp provide a secure grip of membrane and roof flashing materials.