Low level Cistern leak

[GusGF]

Please see attached file.. (posting this using my mobile phone is proving a challenge. Trying to attach a photo. When I click on the camera icon it just takes me to the bottom of my message below as if to add more text! Clicking on the picture icon requires a URL. Choosing "upload a file" does not show me the photo I've attached when viewed in the previewer! So may have to edit this on the computer later, apologies)

I've got a leak from the black rubber collar (can anyone tell me what this is called so I know what I'm ordering) whenever I flush. Additionally do I need to add any silicone sealant when I refit the seal joining the bowl and cistern pipe?

Any help or advice appreciated.

 

[flameport]

Flush cone connector, no sealant is required.
Make sure the ceramic is cleaned properly before fitting the new one.

 

[GusGF]

Flush cone connector, no sealant is required.
Make sure the ceramic is cleaned properly before fitting the new one.

Great, there seems to be a few types so I take my one along to compare.

Thanks at least now I know what I'm looking for

 

[GusGF]

Okay repaired the leak, a lot of the DIY stores are calling them flush pipe connectors. I got a standard one from Wickes which was a different design to the leaky one I've replaced and instead of a female connection to the toilet bowl it was an internal or male connection.