We have a new geberit concealed tank and duravit wall hung toilet.
Occasionally, after flushing, the tank continues to pour water into the bowl so that the tank does not fill.
I assume the flapper has not closed?
The problem with these tanks is getting access to the parts - we can't even see the flapper.
Anybody seen this before - any ideas?
It seems to occur more frequently if the shower is on, or a faucet is running - but its also occurs when neither of these are on.
The original plumber who did the install (as part of remodel) didn't have a clue and is not being helpful