BS EN 806-4:2010

BS EN 806-4:2010 Specifications for installations inside buildings conveying water for human consumption. Installation

BS EN 806-4 specifies requirements and gives recommendations for the installation of potable water installations within buildings. It also covers pipework outside buildings but within the premises in accordance with BS EN 806-1:2000 Specifications for installations inside buildings conveying water for human consumption. General. BS EN 806-4 applies to new installations, alterations and repairs.

BS EN 806-1 specifies potable water installation requirements and gives recommendations on:

• Design
• Installation
• Alteration
• Testing
• Maintenance and operation.

BS EN 806-1 also covers the system of pipes, fittings and connected appliances installed for supplying potable water.

Contents of BS EN 806-4:

Foreword

1 Scope

2 Normative references

3 Terms and definitions

4 Work on site

4.1 General

4.2 Handling of materials

4.3 Bending pipes

4.4 Jointing of pipes

4.4.1 General

4.4.2 Pipe materials and jointing methods

4.4.3 Boilers and instantaneous water heaters connection

4.5 Joining pipes to cisterns

4.5.1 General

4.5.2 Steel pipes to steel, fibre cement or glass reinforced plastics cisterns

4.5.3 Copper or plastics pipe to steel, fibre cement or glass reinforced plastics cisterns

4.5.4 Concrete cisterns

4.5.5 Thermo-plastics cisterns

4.6 Underground pipe laying

4.7 Pipework in buildings

4.7.1 Allowances for thermal movement and prevention of noise

4.7.2 Pipe fixings

4.7.3 Concealed (hidden) piping

4.7.4 Piping passing through structures

4.7.5 Clearance of structural members

4.7.6 Penetration of fire walls and floors

4.7.7 Drainage and prevention of air locks

4.7.8 Pipe positioning

4.8 Valves and taps

4.9 Identifying and recording piping locations

4.9.1 Location of pipes and valves

4.9.2 Identification of above ground piping

4.9.3 Record of installation

4.9.4 Identification of valves installed above ground

4.10 Water conditioning devices

5 Dissimilar metals

5.1 General

5.2 Combination of pipes and fittings/valves made of different metals

5.3 Flow-direction-rule

6 Commissioning

6.1 Filling and hydrostatic pressure testing of the installations inside buildings conveying water for human consumption

6.1.1 General

6.1.2 Steel pipes, stainless steel pipes and copper pipes (linear elastic material)

6.1.3 Plastics pipes (elastic or visco-elastic material)

6.2 Flushing the pipework

6.2.1 General procedure

6.2.2 Flushing with water

6.2.3 Flushing procedure with water/air mixture

6.3 Disinfection

6.3.1 General

6.3.2 Selection of disinfectants

6.3.3 Methods for using disinfectants

6.3.4 Disinfection of storage cisterns and distributing pipes

6.3.5 Localised repairs

Annexes

Bibliography