Had a toilet put in back in October last year and we've got a new problem just started occuring this week. It's one of those new types where there are 2 buttons for short and long flush. The problem is that after flushing it does not stop and continues draining into the loo, the button goes all floppy at this point. Internally it seems a bit flashy, the button connects to a pipe via an unclipable connector and then down in the bottom of the loo there's a large plastic box with the following label on the top. Please login (registration is free!) to view this link. http://www.lab-sanitary.com That website errors for anything other than the front page. The ballcock mechanism also seems a bit high tech but that does appear to work ok. If you stop the water flowing in, that stops the water flowing on into the toilet and then it seems to work again for a while.