Quote Originally Posted by Dave Silcock View Post
Rick Diehl built PDL Mustang 2 with a fluxing torch made out of an old truck remote mounted oil filter. You put the acetylene in one side and a pipe near to the bottom of the filter body, which was filled with the liquid you bought, mixed it all up as a gas and it came out the other side and burnt with a lovely green flame. I have brazed with one and it's like night and day, you can see the crap being washed away as you are heating the work. Not having to re dip into flux is a big help as well.
Any remote oil filter will do the trick, the acetylene just bubbles through the flux on its way to the torch and you can run the weld continuously. Best to have a dedicated acetylene set with this set up though because the hoses etc become contaminated with the flux and there will always be some residual. Pretty hard on hoses too if I recall correctly.