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Specification for design, installation, testing and maintenance of services supplying water for domestic use within buildings and their curtilages
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Available format(s): Hardcopy, PDF
Superseded date: 15-04-1997
Language(s): English
Published date: 30-04-1987
Publisher: British Standards Institution
ForewordCommittees responsible SpecificationSection one. General1 Scope2 Definitions3 MaterialsSection two. Design considerations4 Initial procedures5 Cold water services6 Hot water services7 Prevention of bursting8 Pipe sizing9 Preservation of water quality10 Frost precautions11 Accessibility of pipes and water fittings12 Water economy and energy conservationSection three. Installation13 Work on site14 Inspection, testing and commissioning of pipelines, services and installationsSection four. Maintenance15 MaintenanceAppendicesA Legal requirementsB Noise and vibrationC Examples of pumped systemsD Guidance on the calculation of hot water storage capacityE Pipe sizing calculationF Jointing of potable water pipeworkG Procedure for the detection of water leakages in metered water servicesH Publications referred to in this standard or related to itTables1 Recommended minimum storage of cold water for domestic purposes (hot and cold outlets)2 British Standards for stopvalves3 Recommended internal dimensions for meter chambers4 Design flow rates5 Maximum water velocities in pipework6 Backflow prevention measures to be used with various types of water fittings and appliances7 Air gaps at taps8 Dimensions of type A air gap9 Minimum thickness of thermal insulating material to delay freezing for frost protection10 Examples of insulating materials11 Maximum permissible lengths of uninsulated hot water pipes12 Maximum permitted rates of heat loss from pipes13 Jointing of light gauge copper and stainless steel tube14 Thrust per bar internal pressure15 Bearing capacity of soils16 Method of branch pipe connection17 Maximum spacing of fixings for internal piping18 Case 1: minimum sizes of storage vessel19 Case 2: minimum sizes of storage vessel20 Loading units (hot or cold supply)21 Equivalent pipe lengths (copper, plastics and stainless steel)22 Typical loss of head through taps and equivalent pipe lengths23 Hot and cold water supply supplied from storage24 Hot and cold water supply direct off main service25 Jointing of potable water pipeworkFigures1 Connections for meters outdoors2 Proprietary meter yokes for meters outdoors3 Meter installation indoors4 Meter installation indoors using a proprietary meter yoke5 Metre installation indoors in cupboard6 Installation of water softeners7 Choice of hot water system8 Direct (vented) system9 Indirect (vented) system10 Indirect unvented (vented primary) system11 Indirect unvented (sealed primary) system12 Illustration of obstruction of inlet or feed pipe13 Example of secondary backflow protection of supply pipes14 Examples of secondary backflow protection of distributing pipes15 Typical examples of pipes entering buildings16 Accessibility of pipes17 Clear space needed above storage cisterns18 Directions of thrusts developed in a pipeline due to internal pressure19 Recommended positions of notches and holes in timber beams and joists20 Indirect boosting from break cistern to storage cistern21 Indirect boosting with pressure vessel22 Direct boosting23 Direct boosting with header and duplicate storage cisterns24 Conversion of loading units to design flow rate25 Determination of pipe diameter: cold water service (water at 12.8 deg C)26 Determination of pipe diameter: hot water service (water at 80 deg C)27 Head loss through stopvalves28 Head loss through float-operated valves29 Example of pipe sizing for hot and cold water services, low pressure system30 Example of pipe sizing for hot and cold water services, mains pressure system31 Typical pipework networkIndex
Covers the system of pipes, fittings and connected appliances installed to supply any building, whether domestic or not, with hot and cold water for ablutionary, cleaning, sanitary, culinary, drinking and domestic laundry purposes.
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