Hi, I have an electric shower at presant but would prefer to have a thermostatic shower.My questions are can I take a supply from the hot water tap? and how do I know if the pressure is good enough or can you get showers that compensate for low pressure. The pressure on the cold water is really good which comes from a tank in the loft but the hot water is heated by the boiler and the water seems to run quite fast but I have no idea on the pressure. The last question is about the shower, I don't have much room in the wall as its breeze block. I could chase out for the pipes but is it possible to get a thermostic that does not need to be concealed in the wall?