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BS EN 806-4:2010
Specifications for installations inside buildings conveying water for human consumption. Installation (British Standard)
This European Standard specifies requirements and gives recommendations for the installation of potable water installations within buildings and for pipework outside buildings but within the premises in accordance with EN 806-1. This European Standard is applicable to new installations, alterations and repairs.
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British Standards Institution [bsi]
British Standards Institution [bsi]