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Below Ground Building Drainage

Upcoming Courses 
Key Areas  
Course Content
Learning Outcomes
Who Should Attend
Course Timings
Course Fees
In-House Training

A full overview and agenda, need to know information, and booking instructions can be found on the individual upcoming course pages. Click on a course below to view.

Upcoming Courses 

10th October 2019 | London - Find out more

Key Areas  

  • Generic drainage technology
  • Wastewater design criteria
  • Pumped Basement drainage considerations and anti-flood measures
  • Surface water design criteria
  • SUDS techniques
  • Alternative drain pipe materials

Course Content 

A general introduction to below ground building drainage systems, covering the key features of typical drainage systems, explaining practical applications, and including some drain sizing examples.

Session 1: Drainage Principles
  • Introduction- case study
  • Drains and sewers: an explanation
  • Types of drainage systems
  • Functional requirements for drainage
  • Falls, gradients and self-cleansing velocity
  • Bedding for drainage pipes
  • Points of access and inspection  

Session 2: Foul Drainage 
  • Determining discharge rates in foul systems
  • Discharge stack connections/ use of stub stacks
  • Intercepting traps and trapped gullies
  • Ventilation of foul drainage systems including air admittance valves
  • Grease from catering- how to deal with it and why

Session 3: Surface Water Drainage 
  • Flood risk assessment and discharge rates in surface water systems
  • Rainwater drainage system connections
  • SUDS and attenuation requirements/ fast or slow water?
  • Green or Blue roofs and rainwater harvesting
  • Soakaways and infiltration systems including permeable paving
  • Gullies and linear drainage products

Session 4: Special applications, material types, testing and maintenance 
  • Petrol interceptors and separators- types and classes
  • Septic tanks, cesspits and sewage treatment systems
  • Basements- sump pumps, lift stations and anti-flooding valves
  • Cavity drainage systems
  • Fire-fighting lift drainage – what are the options?
  • Drain pipe materials and fittings
  • Testing and maintaining drainage systems
  • References, bibliography and recommended reading    

Learning Outcomes

  • Define typical drainage terminology
  • Manipulate drainage gradient information
  • Describe the basic principles of drainage bedding
  • Explain the alternative access provisions
  • Determine wastewater design flows
  • Explain Basement pumping and anti-flooding considerations
  • Describe the alternative grease prevention measures
  • Determine surface water design flows
  • Describe the three main SUDS techniques
  • Name the three main types of petrol interceptors 
  • Explain the benefits and disadvantages of typical alternative drain pipe materials
  • Describe the main inspection and testing methods

Who Should Attend 

This course is designed for people with limited knowledge of below ground drainage systems who require a general overview of the whole subject covering the features that may be encountered in a typical building drainage scheme.

Course Timings 

Registration will be at 09.30
Start Time: 10.00
Latest Finish: 5.00

Course Fees 

  • Members Rate: £336 (£280 ex VAT)
  • Standard Rate: £372 (£310 ex VAT)

In-house training at your site

Training multiple staff at once is the most cost effective way to develop staff for organisations. All our courses can be delivered at your site (min 6 staff) at discounted rates. These In-House courses are only available in the UK and Europe. For an In-house quote please email; 
Name of course, approximate number of staff and your site address 


To contact the CIBSE Training Team with a query please

Email: or call: +44 (0)20 8772 3660