Waterless 1514 1-Quart EverPrime Drain Trap Liquid Eliminates odors emanating from floor drains in restrooms, warehouses, public areas and confined spaces Floordrains 1-1/2-Inch to 2-Inch , add 3 oz. of Ever Prime Floordrains 3-Inch to 4-Inch , add 6 oz. of Ever Prime Ever Prime pays for itself on its first application