Hello!
I decided to write this topic because I have a problem with a Geberit concealed cistern. Unfortunately, water suddenly started to drip from the toilet bowl and I have no idea what the reason is. I took apart the plastic casing to get inside and try to "move" the whole mechanism. I noticed there was a constant "hissing" noise, as if the water in the tank could not fill completely and the water supply to the flush tank was not shut off.
I have never repaired a flush and / or installed similar things before, and due to the current epidemic and my reduced immunity, I would not like to call on the hydraluika case like this. That is why I am asking you for help in finding out what could be the cause and how could I repair the cistern on my own?
The photo below shows the mechanism after opening the housing:
[align = center: 3e679419af]
I decided to write this topic because I have a problem with a Geberit concealed cistern. Unfortunately, water suddenly started to drip from the toilet bowl and I have no idea what the reason is. I took apart the plastic casing to get inside and try to "move" the whole mechanism. I noticed there was a constant "hissing" noise, as if the water in the tank could not fill completely and the water supply to the flush tank was not shut off.
I have never repaired a flush and / or installed similar things before, and due to the current epidemic and my reduced immunity, I would not like to call on the hydraluika case like this. That is why I am asking you for help in finding out what could be the cause and how could I repair the cistern on my own?
The photo below shows the mechanism after opening the housing:
[align = center: 3e679419af]
and this is the interior:
[align = center: 3e679419af]
After reading a few topics on this forum, I came to the conclusion that the float filling valve may be to blame, which has stopped working properly due to limescale deposits. On a few instructional videos, they recommend turning off the water tap (the one just above the cistern - in my case in the photo with a screwdriver) as one of the first steps. I turned the screw (to the stop), but the water "hisses" in the area of the float - as if nothing had changed. Does this mean that the valve that does not shut off the water supply or the float is to blame? It is only when the main water supply is turned off vertically that the sound and water filling / overflow stop.
Should I try to replace the filling valve itself in such a situation (e.g. with the following one: https://www.castorama.pl/zawor-napelniajacy-3-8-1-2-p-id-1108367.html or https: // www.leroymerlin.pl/hydraulika/akstrong-dopociągenia-wody/zawory-spustowe-i-mechanizm-napelniajace/zawor-napelniajacy-plywakowy-bialny-3-8-1-2-mosiadz-equation,p432565,l1926.html) ? I also do not know if I should choose a 1/2 or 3/8 valve. Unfortunately, nowhere on the casing and in the center of the part I found an inscription that could somehow direct me.
I am sorry if the questions I am asking are "very basic". I count on your understanding and help in this matter.
