I have a Powertig 250EX for almost two years and love it. I Have noticed that the gas line does not hold the gas as my other machines do. The argon leaks down in the line after closing the valve on the tank. Takes about 5 minutes to leak down to nothing. My Hobart Handler 210 mig machine holds the gas fine for almost ever.

Is it normal for the Powertig 250EX to leak down like that?

BTW...if you ever get a chance, open up your machine and look inside. (Make sure you unplug it first and ground it so any contact to electrical parts is not met with a zap!)

It is amazing the engineering that went into it. Lots of heavy duty parts. I did notice when I opened mine up that the electrical connection to the torch was really loose. Tightened it up and it runs a whole lot smoother.