Devices to prevent pollution by backflow of potable water. Hose Union anti-vacuum valves. DN 15 to DN 25 inclusive Family H, type B and type D. General technical specification Ingestion-build-83346 Who is BS EN 1931

Who is BS EN 1931 - Determination of water vapour transmission properties for

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Devices to prevent pollution by backflow of potable water. Hose Union anti-vacuum valves. DN 15 to DN 25 inclusive Family H, type B and type D. General technical specification Ingestion-build-83346 Who is BS EN 1931What is BS EN 15096 about? BS EN 15096 covers devices to prevent pollution by the backflow of potable water. BS EN 15096 specifies the characteristics of hose union anti vacuum valves of nominal size DN 15 up to and including DN 25 that are suitable for use in drinking water systems at pressures up to and including 1 MPa (10 bar) and temperatures up to and including 65 C and for 1 h at 90 C. HB protects against back siphonage only and is installed in