The file number for this listing is 5894. Products stamped with the IAPMO trademark symbol "UPC" are recognized as complying to the latest edition of the Uniform Plumbing Code and the applicable industry standard. The UPC symbol provides engineers, inspectors, contractors and consumers with peace of mind. Products carrying the symbol are tested, reliable, and backed up with documentation. For these reasons it also provides Fernco with a competitive edge over products that are not listed as conforming to the UPC.