Main Changes

This approved document supports Part H of Schedule 1 to the Building Regulations 2010. It takes effect on 1 October for use in England*. The 2002 edition as amended, will continue to apply to work started before 1 October 2015 or work subject to a building notice, full plans application or initial notice submitted before that date. The main changes are:

  • Additional guidance on solid waste storage in H6 and reference
  • Consequential amendment of limits of application of requirement H3 due to amendment of Part M.

  • Diagram 1 Direct connection of ground Floor WC to a drain Part H1 Diagram 1 Direct connection of ground Floor WC to a drain Part H1
  • Diagram 2 Branch connection to stacks- crossflow prevention Part H Diagram 2 Branch connection to stacks- crossflow prevention Part H
  • Diagram 3 Branch Connections Part H Diagram 3 Branch Connections Part H1
  • Diagram 4 Branch ventilation pipes part H1 Diagram 4 Branch ventilation pipes part H1
  • Diagram 5 Stub stack Part H1 Diagram 5 Stub stack Part H1
  • Diagram 6 Termination of ventilation stacks or ventilation part of discharge Part H1 Diagram 6 Termination of ventilation stacks or ventilation part of discharge Part H1
  • Diagram 7 Pipes Penetrating walls Part H2 Diagram 7 Pipes Penetrating walls Part H1
  • Diagram 8 Pipe runs near buildings Part H2 Diagram 8 Pipe runs near buildings Part H1
  • Diagram 9 Discharge capacities of foul drains running 0.75 proportional depth Part H Diagram 9 Discharge capacities of foul drains running 0.75 proportional depth Part H1
  • Diagram 10 Bedding for pipes Part H Diagram 10 Bedding for pipes Part H1
  • Diagram 11 Protection for pipes laid in shallow depths (minimum sizes) Part H Diagram 11 Protection for pipes laid in shallow depths (minimum sizes) Part H1
  • Diagram 12 Joints for concrete encased pipes(minimum sizes) Part H Diagram 12 Joints for concrete encased pipes(minimum sizes) Part H1
  • Diagram 1 Drainage Field H2 Diagram 1 Drainage Field H2
  • Diagram 2 Drainage mound Part H2 Diagram 2 Drainage mound Part H2
  • Diagram 3 Typical horizontal flow reed bed treatment system Part H2 Diagram 3 Typical horizontal flow reed bed treatment system Part H2
  • Diagram 4 Typical flow reed bed treatment system Part H2 Diagram 4 Typical flow reed bed treatment system Part H2
  • Diagram 1 Rainfall intensities for design of gutter and rainfall pipes (litres per second per square metre) Part H3 Diagram 1 Rainfall intensities for design of gutter and rainfall pipes (litres per second per square metre) Part H3
  • Diagram 2 Rainfall intensities for design of drainage from paved areas and underground rainwater drainage (litres per second per square metre) Part H3 Diagram 2 Rainfall intensities for design of drainage from paved areas and underground rainwater drainage (litres per second per square metre) Part H3
  • Diagram 3 Discharge capacities of rainwater drains running full Part H3 Diagram 3 Discharge capacities of rainwater drains running full Part H3
  • Table 1 Minimum trap sizes and seal depths Part H1 Table 1 Minimum trap sizes and seal depths Part H1
  • Table 2 Common branch discharge pipes unventilated Part H Table 2 Common branch discharge pipes unventilated Part H1
  • Table 3 Minimum Diameters for discharge stacks Part H Table 3 Minimum Diameters for discharge stacks Part H1
  • Table 4 Materials for sanitary pipework Part H Table 4 Materials for sanitary pipework Part H1
  • Table 5 Flow rates from dwellings Part H Table 5 Flow rates from dwellings Part H1
  • Table 6 Recommended minimum gradients for foul drains Part H Table 6 Recommended minimum gradients for foul drains Part H1
  • Table 7 Materials for below ground gravity drainage Part H1 Table 7 Materials for below ground gravity drainage Part H1
  • Table 8 Limits of cover for class 120 clayware pipes in any width of trench Part H Table 8 Limits of cover for class 120 clayware pipes in any width of trench Part H1
  • Table 9 Limits of cover for class M concrete pipes in any width of trench Part H Table 9 Limits of cover for class M concrete pipes in any width of trench Part H1
  • Table 10 Limits of cover for thermoplastic (nominal ring stiffness SN4) pipes in any width of trench Part H Table 10 Limits of cover for thermoplastic (nominal ring stiffness SN4) pipes in any width of trench Part H1
  • Table 11 Minimum dimensions for access fittings and inspection chambers Part H Table 11 Minimum dimensions for access fittings and inspection chambers Part H1
  • Table 12 Minimum dimensions for manholes Part H Table 12 Minimum dimensions for manholes Part H1
  • Table 13 Maximum spacing for access points in metres Part H1 Table 13 Maximum spacing for access points in metres Part H1
  • Table 14 Materials for access points Part H1 Table 14 Materials for access points Part H1
  • Table A1 Flow rates from dwellings Part H Table A1 Flow rates from dwellings Appendix H1
  • Table A2 Flow rates from appliances Part H Table A2 Flow rates from appliances Appendix H1
  • Table A3 Minimum trap sizes and seal depths additional to Table 2 Part H Table A3 Minimum trap sizes and seal depths additional to Table 2 Appendix H1
  • Table C1 Characteristics that should be considered when designing or laying a shared drain:sewer so that it meets the basic requirements for adoption Part H Table C1 Characteristics that should be considered when designing or laying a shared drain:sewer so that it meets the basic requirements for adoption Appendix H1
  • Table 1 Calculation of drained area Part H Table 1 Calculation of drained area Part H3
  • Table 2 Gutter sizes and outlet sizes Part H Table 2 Gutter sizes and outlet sizes Part H3