I do not use much my MF100. I have just to try it out and flow is the same as at the beginning (rotten jet 2metres no more. In short I dismounted to see inside. Nothing spectacular ... The nozzle is small . I just increase the flow by drilling with a wick 1.5mm and, surprise !!! The flow goes from 2m to 4m. For those who have the same machine that I, adopt a solution.