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Devices to prevent pollution by backflow of potable water. Pressurised air inlet valves DN 15 to DN 50. Family L, type A and type B|Pollution, Water supply and waste systems (building, Acoustics, Water pollution, Flow control, Water supply, Check valves, Marking, Potable water, Size, Anti-siphonage systems, Water supply engineering, Designations, Chemical properties, Atmospheric pressure, Graphic symbols, Valves
186 GBP
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