Our square top 9642 and 1943 model drains are installed as general purpose, medium duty floor drains and as indirect waste drains meant to catch liquids from an overhead outlet that it is not connected to. They are constructed of 14 gauge, Type 304 stainless steel and designed for environments that require consistently high levels of sanitation and fixture materials that durably withstand corrosive liquids (such as in food handling or chemical processing plants). A 6” sq. loose-set slotted stainless steel grate covers the drain and allows easy access for cleaning . A USDA compliant model is also available.