I need to remove my mixer shower to tile behind it. How is it fixed to the wall? Is it srewed onto a back plate? I am thinking you would remove the pipes then turn the whole mixer anti clockwise to remove it. Is this right? I would also like to run the pipe work inside the hollow partition wall it is currently running along. Is it posible to buy chromed metal covers that can go over the pipes where they will go into the wall? If yes, where from? Many thanks.