I have just moved into a house that has the above shower with a system boiler (water tank in loft and immersion heater). It also has a wireless stop start remote control button. I understand that if I replace the boiler with a combi that the pump will have to be removed from the shower. Does this mean that the pressure will then be pants on it? Also will I still be able to use the wireless on/off switch (I read somewhere you can't for some reason). Sorry for all the questions, it's moving house syndrome.