Ac, I see what your saying. You are meaning purge as I braze not after. I did not do this. Its strange because i've not seen any of the local HVAC techs do that. It does sound much cleaner and safer way of doing things. Good news is that there has always been left over propane in the system as I was brazing on the shorter cap tubes so at least those were done right.
I would have keep the original intact but it was the only cap tube I had that size. But I did measure it very well so I should be able to duplicate it if it is needed.
I use to do some pretty serious paintballing so I still have access to CO2 and HPA. Both I think would purge very very well.
Work has been crazy busy and some family in the hospital. I'll get another test run done soon and post the data.
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