BS EN 14454:2005

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Devices to prevent pollution by backflow of potable water. Hose union backflow preventer DN 15 to DN 32 inclusive. Family H, type A|Endurance testing, Anti-siphonage systems, Water pollution, Marking, Performance testing, Potable water, Flexible pipes, Designations, Flow control, Water supply and waste systems (building, Leak tests, Pollution, Valves, Check valves, Size, Water supply

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