How can I get the water pipes throgh the smallest holes possible in my tiles in order to install a new wall mounted radiator? I do not want the water pipes to come up through the floor. There is access to underneath floor relatively nearby. The pipe will need to have a bend in it in order to attach the thermostat. The rest of the mountings are on the surface and do not need any access from behnd the wall for installation purposes. I am sure a previous plumber managed this through a very small hole but I do not know how he did it.