Hi all can someone reconmend a concealed cistern system for me. On a Flat refurb we have done the architect specified easi plan gear but we have just had endless problems with the flush valve sticking when the the 6 litre flush is pressed. The whole mechanisms have been changed and the problem has returned. Everything has been installed to the instructions. The flush is operated by a cable. I have thought of adding some fishing weights to this to ensure that the mechanism drops back down to seal the cistern as well as some stronger springs at the flush plate, but I think the client would rather just have the whole ot replaced with a reliable system.