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Building Drainage Explained

Key Areas  
Course Content
Learning Outcomes
Who Should Attend
Course Timings
Course Fees
Upcoming Courses

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 and coffee will be at 09.30
Course will start at 10.00 and finish at 4.30

Course Fees 

Members Rate: £336 (£280 ex VAT)

Standard Rate: £372 (£310 ex VAT)

Upcoming Courses

9th May 2018 | London - Building Drainage Explained - A1606

3rd August 2018 | London - Building Drainage Explained - A1690

19th October 2018 | London - Building Drainage Explained - A1658

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 3637