Devices to prevent pollution by backflow of potable water - Pipe interrupter with permanent atmospheric vent DN 10 to DN 20 - Family D, type C; German version EN 14453:2005— 18 стр.
Devices to prevent pollution by backflow of potable water - Pipe interrupter with atmospheric vent and moving element DN 10 to DN 20 - Family D, type B; German version EN 14452:2005— 18 стр.
Valves for water supply - Fitness for purpose requirements and appropriate verification tests - Part 3: Check valves; German version EN 1074-3:2000— 7 стр.