Jukes

Hi All, I am a complete novice after a little bit of advice from one of you experts please? I have just had a new shower fitted in my ensuite upstairs and wanted some advice on any simple, cheap ways to improve the water performance? Brief details: gravity fed system thermostatically controlled shower valve with 200mm square shower head (ceiling mounted) shower pump 1.5 bar twin impellor (positioned in loft) If I turn the heat dial on the shower valve to full cold I get a great water flow rate, in the default setting the water isn't very hot and not very good flow-rate. When you turn it o