AWWA C116/A21.16-22

This standard describes protective fusion-bonded coatings for the interior and exterior surfaces of ductile-iron and gray-iron fittings used for raw water, potable water, reclaimed water systems, and nonaggressive wastewaters. The standard describes the material, application, and performance requirements for these coatings.

This standard, or sections of this standard, can be referenced in the purchaser’s documents for fittings with an interior and exterior fusion-bonded coating. For applications involving potentially aggressive wastewaters, consult the pipe manufacturer for the suitable lining.