DS EN 15096:2008 Devices To Prevent Pollution By Backflow Of Potable Water - Hose Union Anti-Vacuum Valves - Dn 15 To Dn 25 Inclusive Family H, Type B And Type D - General Technical Specification Defines the characteristics of hose union anti-vacuum valves of nominal size DN 15 up to and including DN 25 that are suitable for use in drinking water systems at pressures up to and including 1 MPa