Backflow of potable water can pollute it, and poses health risks for users. This is preventable through device design. BS EN 13077 discusses devices to prevent pollution by backflow of potable water. Air gap device is the simplest backflow prevention method. When installed and maintained properly, the air gap device works to prevent drain water from the sink from backing up and contaminating it.
BS EN 13077 specifies the characteristics and the requirements of the 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 the protection of potable water in water installations from pollution by backflow. BS EN 13077 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 BS EN 13077 during normal working use.
BS EN 13077 on air gap devices with non-circular overflow is useful for:
All materials that come in contact with potable water need to be such that they don’t cause health risks to users. These materials should not cause any change in the potable water in terms of quality, appearances, smell, or taste. All materials need to be compatible among themselves and with the water supplied and with the fluids or substances that can come into contact with them.
BS EN 13077 provides you with the necessary guidance on the characteristics and the requirements of the air gap device with non-circular overflow. BS EN 13077 includes materials required for manufacturing air gap devices, requirements that include protection assembly, water inlet device, overflow arrangements, and air gap distance. BS EN 13077 helps you to manufacture high-quality air gap devices that avoid water contamination and protect users.
BS EN 13077:2018 supersedes BS EN 13077:2008, which is withdrawn. BS EN 13077:2018 includes some technical and editorial changes with respect to BS EN 13077:2008.
These include:
EN 13077:2018