Fluidsensor Schwab type cistern

[mailtrebor]

Hi all,
Could anyone tell me how to check the outlet seal on one of these types of cistern. Not entirely sure it is this make, but it’s the closest I could find in the internet. It is passing water into the toilet bowl, and it seems to be a sealed white plastic cistern as shown in the attached photo.

Thanks for any advice offered….

 

[Deleted member 267285]

If it has a flushpipe, then it’ll likely be the float valve. That lid should pull off.

 

[mailtrebor]

It anyone has any advice on this please, as suggested in the reply I have received the lid of the unit does not seem to come off