Technical FAQs

What is the difference between NSF 61 and NSF 14?

The NSF 61 listing establishes the health effects requirements for the chemical contaminants and impurities that are indirectly imparted to drinking water from products, components and materials used in drinking water systems.

The NSF 14 listing pertains to the minimum physical, performance health effect, quality assurance, marking and record-keeping requirements for plastic pipe components. These requirements are determined acceptable by various tests performed by NSF on PVC pipe samples from the manufacturer.