What is necessary for plumbing products and materials to comply with referenced standards?

For plumbing products and materials to comply with referenced standards, a third-party certification agency listing is essential. This is because third-party certification agencies evaluate products against specific industry standards and ensure that they meet the established safety and performance criteria. Such listings provide assurance to consumers, contractors, and code officials that the products have been rigorously tested and comply with recognized standards.

While a state approval mark may indicate that a product is recognized within a particular jurisdiction, it does not necessarily imply compliance with broader national or international standards. A warranty from the manufacturer offers assurance about the product's performance but does not guarantee compliance with applicable codes and standards. Similarly, a local building permit is a regulatory requirement for construction projects, but it does not reflect the compliance of individual plumbing products and materials with relevant standards. A third-party certification listing is specifically focused on validating compliance with industry standards, making it the most relevant choice for ensuring that plumbing products and materials are up to code.