I just found underneath my porch a good 4 foot length of 4 inch diameter 1/4 inch thick walled steel pipe. The annoying thing is, I just finnished my science project equipment (biomass gasifier eventually for forge gas) by substituting 4 lengths of 2 inch diameter pipe, and I just found the perfect pipe <sigh> oh well. once I'm done I can make another better one with it in my own time.
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