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Below Ground Building Drainage

6.0 CPD Hours

Standard Rate
£355.00  +VAT
Member Rate
£284.00  +VAT
  • Water Services

Upcoming dates

Book Now

This one-day course will give a well-rounded introduction to below ground drainage principles. Attendees will be able to identify the different types of foul and surface water systems, understand how they interact and see how manipulating falls can affect discharge capacities. 

The course will also consider important ancillary equipment including petrol interceptors, grease traps, soakaways and septic tanks. It will cover when they need to be used and how to incorporate them into a design.

Attendees will also consider how surface water systems are moving from fast water to slow water systems and how that will impact on a design.

Learning Outcomes:

  • Explain key design principles for drainage systems
  • Explain typical foul and surface water drainage systems
  • Manipulate falls and gradients and how to use them in drainage design 
  • Describe the use of pumps and lifting stations
  • State when to use grease traps and petrol interceptors

This course is suitable for:

  • Architects
  • Mechanical Engineers
  • Facilities and Building Managers
  • Graduate Public Health Engineers 

No prior knowledge or preparation is required before attending. 


Agenda for event
Time Description

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

Coffee / tea break (15 mins)


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

Lunch (30 mins) 


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

Coffee / tea break (15 mins)


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. 


16.00 - 16.30

Q & A

Live Online - How to join:

This course will be hosted live online on Microsoft Teams.

A Microsoft Teams account is not required, you will be sent a link to join. 

You can choose to join on your preferred web browser, or if you already have the Microsoft Teams desktop app, click 'join meeting'.  You will then automatically join the course through the app.


Course Materials:

The course presentation and any additional materials will be sent to delegates once attendance is confirmed through a secure link.

We are working towards being more sustainable, therefore we do not recommend materials to be printed.


What is included?

-Full days training with an industry expert trainer 

-CPD Certificate 

-PDF Course materials

Two simple ways to book:

Card - Use the 'Book Now' button at the top of this web page.

Invoice - Please fill in the booking form herePlease note you are only booked onto the course once Training has processed the form.

* If you are having any difficulties please either email us at [email protected] or call, +44 (0)20 8772 3660.


Adrian Flaherty

Adrian Flaherty

Public Health Engineer - Ramboll

Adrian has experience in all areas of Public Health design and installation. This includes domestic hot and cold water services; above & below ground drainage; rainwater & greywater harvesting and firefighting systems. These systems have been designed for a wide range of projects including offices, multi-residential units, hotels, schools, high-rise, airfields, and hospitals. 

Adrian started as a plumbing apprentice and developed as a contractor and designer. He has worked mainly in the UK but also has experience in Europe and the Middle East. Previous work includes the training of apprentices, mentoring graduates and working as a lecturer delivering plumbing and gas training.    

CIBSE Training reserve the right to make changes to the speakers or programme. The right is also reserved in absolute discretion and without further liability to cancel any seminar when fees paid will be refunded. Acknowledged bookings are firm. Cancellation up to 4 weeks before the course is subject to a charge of 25% of fees due, later cancellation is not accepted but delegate substitution is allowed at any time. We reserve the right to request payment in advance for companies which have not had previous financial transactions with CIBSE Services Ltd. 

All delegate alterations / cancellations must be received in writing to: [email protected]  

Please note we do not accept card payments via American express

Please contact the training team before making any travel or accommodation arrangements - particularly if you are travelling from outside the UK mainland, as CIBSE will not be liable for any cost incurred.