BS EN 13077:2018 – TC:2020 Edition
$134.27
Tracked Changes. Devices to prevent pollution by backflow of potable water. Air gap with non-circular overflow (unrestricted). Family A. Type B
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 45 |
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.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 25 | National foreword |
| 28 | European foreword |
| 29 | Introduction |
| 30 | 1 Scope 2 Normative references 3 Terms and definitions |
| 31 | 4 Designation 5 Symbolization 6 Materials |
| 32 | 7 Requirements 7.1 General 7.2 Water inlet device |
| 33 | 7.3 Overflow arrangements |
| 35 | 7.4 Air gap distance A 7.4.1 Single supply 7.4.2 Multiple supplies |
| 36 | 7.4.3 Backflow/back pressure 7.5 Verification 7.5.1 General 7.5.2 Procedure for verification by test (see 7.4.1 a) or 7.4.2) |
| 37 | 7.5.3 Procedures for verification by calculation 8 Marking (not required for products constructed on-site) 9 Technical documents |
| 38 | Annex A (informative) Relationship between h and l for air gap Family A, Type B with rectangular overflow |
| 39 | Annex B (normative) Alternative overflow arrangements |
| 41 | Annex C (normative) Vacuum Test |
