DS EN 14452:2005 Devices To Prevent Pollution By Backflow Of Potable Water - Pipe Interrupter With Atmospheric Vent And Moving Element Dn 10 To Dn 20 - Familiy D, Type B Defines the characteristics of pipe interrupters with atmospheric vent and moving element of nominal size DN 10 up to and including DN 20 that are suitable for use in drinking water systems at pressur