ADOPTED_FROM:EN 13077:2018 This European Standard specifies the characteristics and the requirements of air gap with non-circular overflow (unrestricted) Family A, Type B for nominal flow velocity not exceeding 3 m/s. Air gaps are devices for protection of potable water in water installations from pollution by backflow. This European Standard applies to air gaps in factory-assembled products and to constructed air gaps in situ, and defines requirements and methods to verify and ensure compliance with this European Standard during normal working use.
NS-EN 13077:2018 history
2018NS-EN 13077:2018 Devices to prevent pollution by backflow of potable water — Air gap with non-circular overflow (unrestricted) — Family A — Type B
2008NS-EN 13077:2008 Devices to prevent pollution by backflow of potable water — Air gap with non-circular overflow (unrestricted) — Family A — Type B
2004NS-EN 13077:2003 Devices to prevent pollution by backflow of potable water — Air gap with non-circular overflow (unrestricted) — Family A, type B