Hi, Does anyone know of an aletrnative detergent injection system i.e. alternative to the ones that are 'built into' the pressure washers. I want to be able to control the mix of chemical and water better. Right now, I can spray on an unknown mix percentage with the tube that came on the petrol washer. Even that mix percentage varies depending on the length of HP hose I have attached. The x-Jet nozzles appear to be a great idea - you can choose the mix you want, you don't need to worry about the length of HP hose, and I assume that Hypo isn't good for HP hose (anyone know)? so that isn't a worry either. The problem with x-Jet is that they are expensive and have to be bought from the USA. So, any alternative detergent delivery systems out there for pressure washers?