AWWA

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 American Water Works Association

This standards refer to the piping elements required for low pressure water services. These are less stringent than other standards.
Examples:
C-500 : Gate Valves for Water and sewage system
C-504 : Rubber Seated Butterfly Valves
C-507 : Ball Valves 6" to 48"
C-508 : Swing Check Valves 2" to 24"
C-509 : Resilient Seated Gate Valves for water and sewage
C-510 : Cast Iron Sluice Gate Valves

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