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STN is a protected designation of Slovak national technical standards.
Devices to prevent pollution by backflow of potable water - Unrestricted air gap-Family A - Type A
Standard published on 1.12.2003
Selected format:Devices to prevent pollution by backflow of potable water - Controllable backflow preventer with reduced pressure zone - Family B - Type A
Standard published on 1.6.2023
Selected format:Devices to prevent pollution by backflow of potable water - Controllable backflow preventer with reduced pressure zone - Family B - Type A
WITHDRAWN published on 1.8.2003
Selected format:Devices to prevent pollution by backflow of potable water - Air gap with non-circular overflow (unrestricted) - Family A - Type B
Standard published on 1.6.2023
Selected format:Devices to prevent pollution by backflow of potable water - Air gap with non-circular overflow (unrestricted) - Family A - Type B
WITHDRAWN published on 1.11.2008
Selected format:Devices to prevent pollution by backflow of potable water - Air gap with non-circular overflow (unrestricted) - Family A, type B
WITHDRAWN published on 1.6.2004
Selected format:Devices to prevent pollution by backflow of potable water - Air gap with non-circular overflow (unrestricted) - Family A - Type B
WITHDRAWN published on 1.9.2018
Selected format:Devices to prevent pollution by backflow of potable water - Air gap with submerged feed incorporating air inlet plus overflow - Family A, type C
Standard published on 1.6.2004
Selected format:Devices to prevent pollution by backflow of potable water - Air gap with injector - Family A - Type D
Standard published on 1.3.2026
Selected format:Devices to prevent pollution by backflow of potable water - Air gap with injector - Family A - Type D
WITHDRAWN published on 1.4.2004
Selected format:Latest update: 2026-11-05 (Number of items: 2 209 078)
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