This standard provides dimensional and minimum performance requirements for anti-siphon fill valves for water closet tanks , including protection of the potable water supply against back siphonage of water from the water closet tank.
ANSI/ASSE 1002-2009 history
2009ANSI/ASSE 1002-2009 Performance Requirements for Anti-Siphon Fill Valves for Water Closet Tanks