My shower is knackered and I need to replace it. Currently have a 7kw triton biarritz electric shower on a 32A MCB protected by an RCD (hope I got that right), on a low pressure gravity fed water system. The pressure I used to get from that was pathetic so I want one with more pressure/power. I don't want to have to change electrics/wiring etc, just swap it out for something else (if that is possible), and I don't know about cable sizes. 1: What is the most powerful "electric" shower I can get for MCB type? 2: Can I change to a power shower, and will that be same on electrics etc / is it rated the same etc (I have no idea). As you can probably guess I am not an electrician or plumber, so any help at a technical level I would be able to understand would be greatly appreciated.