National Foreword
European foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Designation
5 Marking - Identification
6 Materials
7 Backflow protection
8 Dimensional characteristics
9 Leaktightness characteristics
10 Pressure resistance characteristics
11 Hydraulic characteristics
12 Mechanical properties - Operating force
13 Mechanical endurance or wear resistance characteristics
14 Acoustic characteristics
Annex A (normative) - Pressure take off tees
Annex B (informative) - Acoustic classification (example)