Running water in Geberit Starck Toilet

Look inside the tank under the lid, it sounds like the flapper that lets the water into the bowl is getting hung up on something when you flush. It could be the flushing lever. This would cause the flapper to stay open letting water to just pour into the open sewer line. It should be a simple fix. Just see what is binding the flapper & make an adjustment.

How old? Who installed? Any warranty? I'd follow that route first.
If not warranty I'd try to get the installer to be interested. Perhaps he will have a "red face" an help out.

sounds as though there may be a trickle of water going in to the pan from the cistern. To check you could turn OFF the water to the cistern, or tie the float arm up. then flsu the water in the cistern so that no more water will trickle in to the loo. Leave it a goodly time, several hours say, and monitor if it still runs for a few mins every hour. Actually running for two/three mins is rather a long time but first i would think you need to eliminate the possibility of the above steady trickle from the cistern.

I have the same problem with my new Gerberit 800 plus fitted last Thursday, it will not stop flushing in the manual it says valve problem contact service dept. Joke they dont give a number for them.

Shut off main water supply
shut off water value going to your wall mounted toilet.
look under your apartment or the room ajoining the wall unit.
look for hidden wall space above unit

http://www.ehow.com/video_117350_stop-toilet-running.html

http://www.google.com/search?q=replacing+flapper&hl=en&sa=G&rlz=1T4GZAZ_enUS363US364&prmd=v&source=univ&tbs=vid:1&tbo=u&ei=S3AcTNrBGYL6lwfN1NmnDg&oi=video_result_group&ct=title&resnum=4&ved=0CCoQqwQwAw

The above link's has videos and information about this problem.

Sounds like the flapper isn't sitting properly. Take the lid off the tank and put a few drops of food coloring in it. Let it sit for a while (do not flush). If the water in the bowl turns that color, that means the flapper needs replacing. Simple to do and costs about 5 bucks. Good luck

i think you have a snake in your bathroom lol

Hi I have exactly the same problem, in fact it could have been me writing this - 3 toliets fine, main bathroom hisses. The Geberit flushing ciphen on the left (the smaller one) has been replaced and there is still a problem. If you look carefully,the water level needs to come up over the lip of an opening on the Geberit part and this causes the valve mechanism to shut off and stop the hissing. It is fine for about 40 minutes and then the hissing starts again if you don't flush it. The reason is that the water level has gone down but there is no obvious signs of where the water is going. It could be that the central flush mechanism is leaking slightly. I am going to replace this part next. If I were you I'd see if you are getting any water leakage into the pan when toilet not in use to see if the water level in the cistern is going down James T

I hate to say it but you may need a pro on this one, if you want I can try to walk you threw it but let me know. [email protected]