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Originally Posted by
nsusammyeb
using co2, argon, helium for stainless. I don't have the set up yet to back purge. Working on that.
You can do a simple "ghetto" setup to back purge. I wouldn't finish weld any of that stainless mani w/o back purging. You probably already know, but it will cause a lot of problems if you don't.
Simple back purge setup: Get some sort of metal to close off the openings with clamps. Have small holes in the metal (I like to use rigid aluminum cause it's easy to work with), then fill the runners with your gas from either a separate tank and hose, or you can hold the torch so the cup is against the hole and fill it as best as you can with your gas. Then use a small piece of tape to seal the hole up. It's ghetto, but works pretty damn good LOL.