DS EN 14453:2005 Devices To Prevent Pollution By Backflow Of Potable Water - Pipe Interrupter With Permanent Atmospheric Vent Dn 10 To Dn 20 - Family D, Type C Defines the characteristics of one type of pipe interrupters with permanent atmospheric vent nominal size DN 10 up to and including DN 20 that are suitable for use in drinking water systems at pressur