What is a Waste Pipe?

With so many types of soil and waste pipes available, for a beginner, it’s hard to know what’s what. While it may not be easy to see a difference at first, the role both these pipes play are incredibly crucial to the correct working order of the soil and waste system.


What is a waste pipe?

Waste pipes carry wastewater from sinks, showers and other appliances that use water away from your home. They are usually narrower than soil pipes since they are only designed to carry water.

These pipes do not require a venting system since they do not carry contaminated water that can produce harmful gases. Push-fit waste pipes are becoming more and more popular with both DIYers and professional installers. This is because they:

  • Are easy to install
  • Create a water-tight fitting thanks to ring-seal joints
  • Accommodate for thermal movement

Installing a waste pipe

When installing a waste pipe, it is crucial to use fewer connections and keep the piping as simple as possible to ensure the drainage process is smooth and water can be carried away easily.

For more help, check out our video on installing waste pipes and fittings, which demonstrates everything you need to know.


How do waste pipes differ from soil pipes?

Unless you have experience, trying to navigate which pipes are which can be a tough task. The key difference is that waste pipes carry clean water from sinks and showers, whereas soil pipes carry ‘soiled’ water, i.e. from toilets or urinals.

Soil pipes are vented in a particular way to keep your home safe and reduce gases and odours.

Soiled water and waste produce harmful gases, so keeping these pipes vented allows them to be released out of the way rather than keeping them under pressure. To vent the pipes is a requirement of most building regulations too.

Items you will need

  1. FloPlast Chrome Style Waste Pipe - 32mm x 1.1mtr
    Please allow 3-5 working days for delivery
    1. Code CW01
    £45.89 £55.07
  2. FloPlast Chrome Style Waste Pipe - 40mm x 1.1mtr
    Please allow 3-5 working days for delivery
    1. Code CW02
    £45.89 £55.07
  3. FloPlast Push Fit Waste Pipe - 32mm x 3mtr Black
    1. Code WP01B
    £5.02 £6.02
  4. FloPlast Push Fit Waste Pipe - 32mm x 3mtr Grey
    1. Code WP01G
    £5.02 £6.02
  5. FloPlast Push Fit Waste Pipe - 32mm x 3mtr White
    1. Code WP01W
    £5.02 £6.02
  6. FloPlast Push Fit Waste Pipe - 40mm x 3mtr Black
    1. Code WP02B
    £5.76 £6.91
  7. FloPlast Push Fit Waste Pipe - 40mm x 3mtr Grey
    1. Code WP02G
    £5.76 £6.91
  8. FloPlast Push Fit Waste Pipe - 40mm x 3mtr White
    1. Code WP02W
    £5.58 £6.70
  9. FloPlast Push Fit Waste Pipe - 50mm x 3mtr Grey
    1. Code WP03G
    £10.81 £12.97
  10. FloPlast Solvent Weld Waste Pipe - 32mm (I.D.) x 3mtr White
    1. Code WS01
    £6.69 £8.03
  11. FloPlast Solvent Weld Waste Pipe - 32mm (I.D.) x 3mtr Black
    1. Code WS01B
    £6.69 £8.03
  12. FloPlast Solvent Weld Waste Pipe - 32mm (I.D.) x 3mtr Grey
    1. Code WS01G
    £6.69 £8.03
  13. FloPlast Solvent Weld Waste Pipe - 40mm x 3mtr White
    1. Code WS02
    £8.11 £9.73
  14. FloPlast Solvent Weld Waste Pipe - 40mm x 3mtr Black
    1. Code WS02B
    £8.11 £9.73
  15. FloPlast Solvent Weld Waste Pipe - 40mm x 3mtr Grey
    1. Code WS02G
    £7.85 £9.42
  16. FloPlast Solvent Weld Waste Pipe - 50mm (I.D.) x 3mtr White
    1. Code WS03
    £12.85 £15.42
  17. FloPlast Solvent Weld Waste Pipe - 50mm (I.D.) x 3mtr Black
    1. Code WS03B
    £13.32 £15.98
  18. FloPlast Solvent Weld Waste Pipe - 50mm (I.D.) x 3mtr Grey
    1. Code WS03G
    £12.85 £15.42