BS EN 12729:2002(2009) Devices to prevent pollution by backflow of potable water - Controllable backflow preventer with reduced pressure zone - Family B. Type A
1970BS EN 12729:2023 Devices to prevent pollution by backflow of potable water. Controllable backflow preventer with reduced pressure zone. Family B. Type A
0000 BS EN 12729:2002(2009)
2003BS EN 12729:2003 Devices to prevent pollution by backflow of potable water - Controllable backflow preventer with reduced pressure zone - Family B. Type A
2003BS EN 12729:2002 Devices to prevent pollution by backflow of potable water - Controllable backflow preventer with reduced pressure zone - Family B. Type A