Hi all,
I hope I can get a few words of advice here. I have just installed a new bathroom suite, but am a little concerned about the close coupled cistern on the WC. The flooring is chipboard and there is slight flexing in the floor, only a millimetre or two, but when you sit on the pan, the wait pushing down on the pan causes the wc to move, probably by that same millimetre or so. This propagates to the cistern, where you can just feel slight flexing away from the wall at the base of the cistern. I would guess that it's no more than a mm.
I have found other notes in here which suggest that the cistern should not be fixed to the wall, but the installation instructions say that it should, so was the previous one, so are my other two. I have only done up the screws so that the cistern just touches the wall and have used a plastic insert (a cistern washer kit from B&Q) so that the screw is not directly in contact with the porcelin. There is similar movement in the en-suite room upstairs as well, also on chipboard flooring, but this is the original cistern.
Obviously, I don't want the new one cracking. Any words of advice would be appreciated.
Thanks, Keith.