Sorry for having to ask what may be a noob question, but here goes........
How can you have a free flow from your primary if your issues is at the tank valve?
Wouldn't it be one or the other?
If there is a problem with the tank valve wouldn't it leak from there, thus reducing the flow to your regulator?
My brain is telling me that if there is a tank valve problem that that's where the air would be leaking from, not for the regulator?
Again sorry if your situation is obvious to the pros, but I'm just trying to learn and understand??
Thanks,
John