outofthefire
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I don't remember ever having a pressure gauge on any propane bottle i've ever used. I turn it on a bit and look at the flame if I can't get a decent flame I turn the reg up, if it blows out straight away I turn it down. Once it's right I rarely touch them again, unless i'm putting a really small welding torch on then you don't need as much pressure. Going by the flame is an easier way to go