UPC means uniform plumbing Code is the authoritative certification of sanitary ware products entering the U.S. market, while adding "C" refers to the Canadian market. CuPc is the authoritative certification of sanitary ware products in the North American market. The scope of products certified by CuPc is the pipeline and bathroom products exported to the North American market The assessment is carried out by IAPMO (International Association Plumbing and mechanical offices) in the United States.