Hello. I\\\'ve never done any plumbing before and would like to put in a new bathroom. There is currently no shower, just a bath. I was wondering whether running the shower from the bath taps would be the best option (certainly easiest), however at current I have on of those rubber attachments over the bath taps and the pressure from the cold water pushes all of the hot out. Would I have the same problem with a thermastatic mixer attachment? If so how can I solve it?