Sioux Chief 861 Series cast iron floor sink shall be used where necessary in drainage systems or where PVC floor sinks are not permitted. Floor sink shall have an acid resisting porcelain enamel coating (ARE) for superior sanitation, and a high heat discharge rating for commercial hot water drainage applications. Connection to pipe and trap assembly shall be made by means of a no-hub coupling. Grates shall be available in various patterns for intended use. Sump area shall have smooth inner surfaces for quick and complete drainage.