Dripping Suspended Conch - Geberit Frame: Bathroom Refurbishment, Leak Issues, Gaskets & Solutions

After years, the time has come to refurbish the bathroom. Geberit was operational - so it was not exchanged, but the shell was like that. After installation and start of use, water appeared on the floor. They were not large quantities and the leak took a long time after the rinsing - it was rather monotonous. I thought the gaskets were the cause of the trouble. I bought all new (two inflow of water and two outflow of sewage). For a few days it was OK, but now there was water again (a small amount). I am curious about the connection of the shell - Geberit, but of course I do not know where. The most "suspicious" is the combination of the shell with the outflow. There is such a wide gasket. I decided to buy a tightening band to press the gasket on the pipe. The shell drain (Koło shell) looks good, but it is rough. I wonder if this silicone drain should be applied before applying the drain pipe to the gasket. Do you have any ideas / experiences what could be the reason for the leak? Do my offers make sense?

Hello
I met with the occurrence of holes (perhaps technological) under the upper edge of the shells from the inside. Water got between the walls and leaked through the lip seal. Sizing these holes solved the problem. If you have one, it is worth a try.
Greetings.

Somebody told me about these openings, but there is no such thing in the vicinity of the outflow. The bowl is Nova Pro Rimfree

Look for holes under the rim !!!
This is the place where you zap domje or domestos or other szuwax for bacteria.
At the tide, I did not see any openings, and somehow it leaked.

My shell is Rimfree - without a rim!

The main suspect seems to be a lip seal, the more so because it can not be seen after the bowl is mounted.
I would try to increase the diameter of the pan outflow by gluing several layers of some tape and saw how it will behave. A ring with a wheel of a wheelbarrow or a pram would be better. The treatment is reversible as opposed to silicone sealing.

Finally, I determined the place of the leak - it is on the water supply seal (contact with porcelain bowl). I already know why it leaks even for a few days despite the lack of rinsing. Rimfree bowl has a water supply in the upper part, half of it is covered with ceramics. it causes that all the time the water flows in the inflow and it can be there a lot - even 100ml. In case of leaks it will leak for many days. I dismantled the bowl and noticed that the water supply in the ceramics is not perfectly smooth. This is probably why this special seal with 4 lips does not get stuck. My idea is to fill the spaces between the lip of the seal with silicone and then push it into the bowl. What do you think about it?

If you put wet it may be a problem with possible disassembly.
I would try to make a silicone ring on this unevenness and after drying it should be assembled.

There are special lining for folding sewer pipes (eg Skidol) that facilitate assembly and subsequent disassembly and solidify into a jelly-like form and seal these joints very well.
when using silicone, there may be a problem with possible disassembly as you run off the drain.

I've already used silicone. Nothing has been leaking for a few days yet. There will be no problem with disassembly - the pipe will come out of Geberita. I will not be able to remove this part of the shells anymore, but I can buy a connection set for Geberita if something happens with the shell.

Silikon solved the matter. Nothing leaks. At the end, a few tips for people who want to determine where the leak is from. We add a dye to the cistern (eg food for eggs or paint) and gently rinse (so that only a little flew out and the dye filled the "inflow" spaces.) Now, pour the bowl with clean water (from the bucket) and give another dye. We put a paper towel or toilet paper under the toilet and wait, if we're lucky, we'll know what it's leaking in an hour, but often we have to wait for 8-24 hours. Whether it is leaking from the tributary or from the outflow, now only rinsing the cistern and shells, sucking off the water and disassembling is all that remains: on the unglazed surface of the shell and on the foam between the shell and the plates. ceramics (of course depends on the concentration), but in the case of the old it can be a problem.
I close the subject