Why USA requires cUPC certification for ceramic sinks

The USA requires cUPC certification for ceramic sinks because it is a mark of conformity that indicates the product meets the applicable American and Canadian codes and standards for plumbing products. The cUPC certification is issued by the International Association of Plumbing and Mechanical Officials (IAPMO), which is an accredited third-party testing and certification agency. The cUPC certification helps to ensure the quality, safety, and performance of the ceramic sinks and other plumbing products in the USA and Canada.