water pressure

I'm due to have an un vented hot water cylinder installed but have a power shower already. Will the extra pressure blow up my shower? What if I just turn the dial to the lowest setting will it be ok then?

apparently my new bath mixer tap requires 3-5 bar to work. i fitted it and the cold flows ok(ish), as soon as i even slightly turn to open the hot value the flow is reduced to a dribble, i assume the cold it being sucked back up and the hot pressure is poor? I therefore added a 2 bar shower pump...

Hi, just had a new bathroom fitted, and to my annoyance, the waterfall style faucet dribbles out the hot water, only when the cold tap is fully open does it work. My plumber then installed a 2 bar pump, but it still didn't flow properly and dribbled out. The manufacturer says i need 3 - 5 bar...

I am hoping to install a thermostatic shower (Grohe Grohtherm Bath/Shower Mixer Tap 34448000) in order to stop having a shower that is constantly going hot and cold! However, I am very worried that the water pressure - which is just fine (not brilliant, but fine) at the moment will then be...