Quote Originally Posted by performance View Post
As I have told others, that's not what I consider ideal.
The problem is that the coupling and uncoupling of the lines leads to condensation in the mouths of the fittings, introducing moisture to the system. A static situation where valves are used is the best.

It does not solve the changing out torch issue.
I see where it could get a little condensation under some circumstances but so far I haven't noticed anything. I'm never in a hurry since welding is just a hobby for me, but if I were in a hurry I believe I could change torches and hoses in about 40 seconds.
Thanks for the opinion. I like to hear what others think, good bad or indifferent especially from professionals.