Convert concealed cistern for a 2.7 litre single flush

Hi there, yes, you can have a concealed cistern hidden inside the wall and the pipe for the flush will run into the back of a toilet pan which will have to be a wall mounted one (hopefully the type you've already bought?!) where there's two types, either floor standing or a floating pan that is wall hung. http://www.victorianplumbing.co.uk/Back-To-Wall-Toilet-Pan-D-Shape-Soft-Close-Seat-with-Concealed-Cistern.aspx?campaign=googlebase&gclid=CP_VuJasscwCFUyeGwodD24LNw The latter will need extra bracing by the false wall to hold the weight of the pan and someone sitting on it so take this into account when building the wall...push buttons are fine either type, of course, nothing lasts forever, not even handle flushing systems so just make sure there's an access panel built into the false wall for future maintenance...hope this helps! Neil. London's Calling