Hello I tig weld aluminum from time to time at work. I use pure argon on ac but I have welded on dc using helium. I would like to try using argon with all small amount of helium. My question is how to set it up using two flow meters into one line. Can I use by tee or does it need to be at y fitting?...

Thanks OP. I just did some DC tig on aluminum with 4043 and It came out pretty good. I am interested in to try it on something heavy.