Contents Sections 1 Interpretations 2 Materials and substances in contact with water 3 Requirements for water fittings 4 Water system design and installation 5 Prevention of cross connection to wholesome water 6 Backflow prevention 7 Cold water services 8 Hot water services 9 WC's, flushing devices and urinals 10 Baths, sinks, showers and taps 11 Washing machines, dishwashers and other appliances 12 Water for outside use Tables in Regulator's Backflow Prevention Specification S6.1 Schedule of non-mechanical backflow prevention arrangements and devices and maximum permissible fluid category for which they are acceptable S6.2 Schedule of non-mechanical backflow prevention arrangements and devices and maximum permissible fluid category for which they are acceptable Guidance Tables 3.1 Recommended minimum commercial thicknesses of thermal insulation 4.1 Recommended design flow rates of cold and hot water to sanitary appliances 6.1 Examples of interpretation of fluid categories 6.2 Details of backflow prevention arrangements 6.3 Details of backflow prevention devices 8.1 Maximum recommended lengths of uninsulated hot water pipes Figures 3.1 Location and accessibility of concealed water fittings in floors 3.2 Location and accessibility of concealed water fittings in walls and behind baths 3.3 Details of pipes entries to buildings 3.4 Depths of pipes below ground 4.1 Typical examples of water supply systems in houses 4.2 Examples of location of stopvalves 6.1 Water services to sanitary appliances 6.2 Whole site and zone backflow prevention 6.3 Backflow protection to external taps in houses 7.1 Requirements for storage cisterns 7.2 Minimum clear space required above storage cisterns 8.1 Diagrams of unvented hot water storage systems 8.2 Direct and indirect hot water storage systems 8.3 Determination of minimum height of top of vent pipe 8.4 Details of feed and expansion cisterns Abbreviations and Symbols [ Previous ] [ Contents ] [ Next ] Published 22 December 1999 Water Regulations Index Environmental Protection Index Defra Home Page
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