We would like to install a hanging toilet in an area that is 65cm wide, which is fine for us. However someone told us that the mechanism of a hanging toilet (that's hidden in the back wall) needs at least a width of 70cm. How can I determine if this is true?
You also need to be sure your water pressure is adequate (as in high psi). A wall mounted toilet doesn't use a reservoir, but relies on high water pressure for complete flushes.