EBCEasy Building Codes
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  • Part A: Structure19
  • Part B: Fire Safety32
  • Part C: Site Preparation5
  • Part D: Toxic Substances1
  • Part E: Sound8
  • Part F: Ventilation9
  • Part G: Sanitation2
  • Part H: Drainage10
  • Part K: Protection from Falling6
  • Part L: Energy Efficiency23
  • Part M: Access9
  • Part P: Electrical Safety8
  • Part J: Heat Producing Appliances5
  • Part N: Glazing Safety1
  • Part Q: Security in Dwellings1
  • Part R: Electronic Communications1
  • Part S: EV Charging2
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  • CDM & Construction Safety2
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This service provides general guidance based on published building standards. It is not a substitute for professional advice from a licensed building surveyor or certifier.

Part H: Drainage

Foul water, rainwater, wastewater treatment, and building over sewers

10 articles

Foul Water Drainage Requirements

Requirements for foul water drainage systems in UK buildings under Approved Document H, including pipe sizes, gradients, and connections.

14 Apr 2026·3 min read

Rainwater Drainage and Surface Water Management

Requirements for rainwater disposal, surface water drainage, and sustainable drainage systems under Approved Document H3.

14 Apr 2026·3 min read

Building Over or Near Public Sewers

Requirements and procedures for building over or within 3 metres of public sewers.

14 Apr 2026·2 min read

Septic Tanks and Sewage Treatment Plants

Requirements for off-mains drainage including septic tanks and package sewage treatment plants under Approved Document H2.

14 Apr 2026·3 min read

Drainage Testing and Inspection Requirements

Requirements for testing below-ground drainage systems and the Building Control inspection process.

14 Apr 2026·3 min read

Inspection Chambers and Manholes

Requirements for inspection chambers, manholes, and access points in drainage systems.

14 Apr 2026·2 min read

Grease Traps and Fat Interceptors

Requirements for grease management in commercial kitchen drainage.

14 Apr 2026·2 min read

Pumped Drainage Systems

When pumped drainage is needed and the requirements for basement and below-ground installations.

14 Apr 2026·3 min read

Reed Bed and Natural Drainage Treatment

Using reed beds and constructed wetlands for sewage treatment in rural properties.

14 Apr 2026·2 min read

Soakaway Design and Percolation Testing

How to design a soakaway and carry out percolation tests to BRE Digest 365.

14 Apr 2026·3 min read