Hi I have a suspected failure of my hot/cold water feed pump. I turned on the pump and the lights go dim, or in the case of last night complete turned them off and then they came back on when I turned the tap off. So I am almost certainly going to need a replacement pump. Anyone know where this is located in these models, and as anyone changed one and has anyone had this problem on this Elddis model and where can I get a replacement. Thanks