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Drainage & Piped Services Standard Specification
Version 2014-1

Copper pipeline fittings
Manufacturer:
Standards: BSEN 1254
Capillary: To BS EN 1254-1.
Compression: To BS EN 1254-2
Flanges: To BS EN 1092-3
Press fittings: Submit details
Direct Hot Water Storage Supply System
System Performance: Design and detailing hot and cold water systems type B;
Centralized hot water storage system;
Standard: To BS 8558 or BS EN 806-2 and in accordance with HSE publication ‘The control of
legionella bacteria in water systems. Approved code of practice and guidance’.

Pipeline sizes for hot and cold water systems type B;
Draw off requirements for hot and cold water systems type B;
and Electrical resistance trace heating system design.
Storage unit: Storage water heaters, gas fired.
Where a gas supply is not available use a heat reclaim system with immersion heater back up
Electric immersion heater: Required for heat reclaim system
Flues: Balanced flues.
System: Unvented.
Capacity: 300 litres
Pumps: Secondary circulation. Typically Grundfos UPS 15-50B or N for single storey units.
Pipelines: Copper pipelines type A.
Pipeline accessories:
Expansion devices:
Gauges: Pressure gauges and Temperature gauges.
Accessories: Masking plates type B;
Pipeline strainers;
and Pipe sleeves.
Valves: As cold water section
Thermal insulation: as cold water section
Sanitary appliances: See schedule in appendices
Plant and equipment identification:
Execution:
System Completion:

System Performance

Design and detailing hot and cold water systems type B

Design: Complete the design and detailing of the hot and cold water supply.

Standard: To BS 8558 or BS EN 806-2 and in accordance with HSE publication ‘The control of
legionella bacteria in water systems. Approved code of practice and guidance’.

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