56mm waste pipe to 40mm waste pipe - how to join?

[DerekDd]

Hi I am trying to join a new 40mm OD waste pipe onto an old 56mm OD waste pipe - what do I use and where do I get it from?

Thanks as its not easy to find the answers online

 

[Madrab]

new 40mm OD

This is push fit so you can only use a compression fitting.

old 56mm OD

This this is the standard 50mm Solvent Weld (SW) OD.

You would normally need a 50mm to 40mm SW reducer then use a 40mm compression.

 

[DerekDd]

thanks where do you get a solvent weld 50 to 40 reducer from?

 

[Madrab]

FloPlast Solvent Weld Reducing Coupler 55mm x 43mm White - Screwfix