HI, I have just moved into a new house which has a power shower,the only problem is that shower only works when it is turned onto hot, then the pressure dies after a few seconds ,can anyone help.I have striped the pump down and the shaft and impellers seam to be fine ,i have checked the water supply, and the feed to the cold water is 15mm(is this ok)and the hot water is 22mm,please help i miss my shower .
