DS EN 14451:2005
DS EN 14451:2005 Devices To Prevent Pollution By Backflow Of Potable Water - In-Line Anti-Vacuum Valves Dn 8 To Dn 80 - Family D, Type A Defines the characteristics of one type of in-line anti-vacuum valves of nominal size DN 8 up to and including DN 80 that are suitable for use in drinking water systems at pressures up to and includin