Cistern / toilet connection leak

[Tigercat]

I have installed a new toilet in my bathroom this week. I now find that there is a gradual drip of water coming from the cistern/toilet bowl join area.
I have seperated the two halves three times now, to check correct seating of the 'rubber close coupling' (Known as doughnut i believe) and still the problem is there.

Even without securing to the floor and wall.

The item is part of a 'Close coupled closet suite' made by Armitage.

Appreciate any advice to fit this without the leak!

Ade

 

[tincup]

Hi

Is the cistern sat upright on the bowl there by putting equal pressure to the doughnut below?

Hope this helps

 

[doitall]

Remove the cistern and fill it with water. the most likely place for a leak is where the syphon exits the ceramic

 

[Tigercat]

The cistern is as level as I can get it.

Do I use the 'doughnut' without any form of sealant?

 

[Nige F]

NO sealant and follow doitall`s advice

 

[Tigercat]

OK - separate the cistern from the toilet bowl. You imply that the leak might not be around the 'doughnut' itself but through the plastic syphon fitting - large plastic nut/metal clamp. (Which is brand new)

I'm not sure how I can fill the cistern to check this, as obviously there is now the opening which would match up to the toilet.

?

 

[doitall]

You stand the cistern on a sheet of paper and fill it with a bucket or bowl, or watering can or anything else that holds water