IAPMO Uniform Plumbing Code (UPC) Certification Mark: The International Association of Plumbing and Mechanical Officials (IAPMO) Shield is applied to products that are certified by IAPMO as complying with BOTH the product's performance standard AND the Uniform Plumbing Code (UPC). Applies to all plumbing products, appliances, pipe, fixtures, valves and related products.
Source: