What agency must label plumbing products to ensure compliance with safety and quality standards?

The correct answer is a third-party certification agency because these organizations specialize in testing and evaluating plumbing products against established safety and quality standards. Their role is to provide an unbiased assessment of a product's compliance with industry regulations and safety requirements. This independent verification helps to ensure that products meet the rigorous standards expected for quality and safety, thus protecting consumers and maintaining industry integrity.

Third-party certification agencies operate under recognized standards and protocols, which adds credibility to the labeling they provide. When consumers see a product with the mark of a reputable certification agency, they can have greater confidence in its safety and reliability.

On the other hand, while government regulatory bodies set the standards and can implement regulations, they generally do not perform product testing or labeling themselves. Industry associations may promote best practices and provide guidelines, but their role is not primarily focused on certification and compliance. Similarly, plumbing contractors do not typically engage in labeling products; their focus is on installation and service rather than product certification.