EN 13077:2018

European foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Designation
5 Symbolization
6 Materials
7 Requirements
8 Marking (not required for site constructed products)
9 Technical documents
Annex A (informative) - Relationship between h and l for air
                         gap Family A, type B with rectangular
                         overflow
Annex B (normative) - Alternative overflow arrangements
Annex C (normative) - Vacuum Test

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.