Sioux Chief closet flanges do what flanges are designed to do - anchor the toilet to the floor and make a secure connection to the drain. And they do so with the quality and attention to detail contractors have come to expect from an American manufacturer. To Sioux Chief, closet flanges represent an opportunity to make another group of rough plumbing products better. Better for distributors, better for installing contractors. Sioux Chief has been designing and molding closet flanges for 25 years. From the beginning, we have engineered quality into this product. We have never stopped trying to make a better product. Over the years, our refinements have included a knockout that won't break apart, swivel rings made from stainless steel, full flow offset flanges, and more. At Sioux Chief, in addition to developing new products, we continue to improve our production quality. We inspect every closet flange and test every TKO™ for leaks before packaging. Our expert technicians run, maintain and service our molds daily. This level of attention not only prevents production delays, it also allows us to make improvements in design as quickly as we identify the opportunity to do so. For closet flanges, as with all our products, we aspire to make the best ones on the market - to provide the most value for our distribution partners and installing contractors.