Specification - P3080-FL - 8in Round Heavy Duty Stainless Steel Floor Drain with Anchor Flange MIFAB series P3080-FL - 8in round heavy duty floor drain with anchor flange constructed of 14 gauge, Type 304 stainless steel. Free area of 18 square inches. Standard with ANSI rated "Heavy Duty" slotted Type 304 stainless steel grates with a load rating of 5,000 to 7,500 lbs and no hub bottom outlet.