Help needed with Geberit flush pipe seal

[HenryC]

Could somebody tell me how to remove the plastic circlip and rubber washer from a leaking flush pipe connection at the bottom of a Geberit low height concealed cistern? Also is it possible to do this with the cistern and WC in situ?

 

[terryplumb]

Can you post pictures ,I have not come across a circlip on a flush pipe ?

 

[HenryC]

Can you post pictures ,I have not come across a circlip on a flush pipe ?

Here's the diagram:-

 

[just pumps]

Depending on how much wiggle room you have sometimes the flush pipe can be removed without removing anything and sometimes you have to isolate and remove the cistern.