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So everybody knows that if you use a larger orifice size for your pressure nozzle tips you get less pressure. My question is, is there a chart that exists that tells you what size nozzle will give you what pressure at how many GPM. I know that there is a chart that exists to help you properly...

Hi all, I am new to this web site and new to the pressure washing industry. Have been working my but off to learn more about this business to become successfull. Still learning everyday and wondering if anyone knows were I can go to attend a class or weekend course close to home of seattle...