Hi, I've had a new bathroom installed and all is well apart from very wobbly fittings. I've got a Victorian style shower, with an exposed temperature adjuster/water tap, there is a centimetre gap all around the bit that turns. I also have freestanding mixer tap, which moves a great deal more than I expect. Is this normal? I'm worried if I don't sort it now I'll have problems in the future. Could anyone tell me the correct terms, so I don't feel such a dope when I'm talking to the plumber (he's not a patient man). Thank you!