Building Regulations

NHBC Standards – 5 3 Drainage Below Ground

Summary

Chapter 5.3 This Chapter gives guidance on meeting the Technical Requirements and recommendations for the design and construction of foul, surface water and ground water drainage systems.
NHBC Standards do not cover aspects of health and safety relating to building operations and to the handling and use of certain building materials. Such matters are covered by statutory requirements.
This version of the Standards has been updated to include the Amendments to the Standards April 2004. Previous versions of the standards can be accessed in the Archive section (below).

Section 5.3 Contents

DESIGN

  • Design Standard
  • Statutory requirements
  • Drainage system design
  • Design to avoid damage
  • Foul and surface water disposal
  • Ground water drainage
  • Provision of information

MATERIALS

  • Materials standards
  • Drainage materials

SITEWORK

  • Sitework standards
  • Preliminary work
  • Excavation
  • Laying pipework
  • Protection of pipework
  • Access points and gullies
  • Cesspools
  • Septic tanks
  • Surface water soakaways
  • Testing
  • Protection of work

APPENDIX 5.3-A

  • Statutory references

APPENDIX 5.3-B

  • Minimum dimensions for access fittings and chambers

APPENDIX 5.3-C

  • Percolation test procedures for septic tank installations

APPENDIX 5.3-D

  • Septic tank field drain design

APPENDIX 5.3-E

  • Cross section of typical underdrain

APPENDIX 5.3-F

  • Percolation test procedures for surface water soakaways

LIST OF CHAPTERS

INDEX

Archive

  • Chapter 5.3 (2003)
  • Amendments to the Standards (2003)

Source: NHBC Standards
April 2004

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