I got a problem and literally ripped everything out and started again and I still can’t find the problem. I’ve been using a Gardiner pole with a window cleaning warehouse Brush until recently, I’ve just bought a Gardiner brush with 4 fan jets but there isn’t enough water coming through, they look like pencil jets, I’ve turned the controller to maximum but still no joy, I’ve changed all hozelock fitting to brass ones and even by-passed the filters (after buying a new Unger filter). Still nothing works, the water does project out about 4-5 foot so I THINK that should be enough pressure. I’ve even tried a back up pump. Any ideas what I can try next. Thanks ?