Blaiz1, I'm going to have to reiterate what these guys have said, they are correct. Why are shutting your compressor off when you equalize the tank to what's in the line? Set your compressor for 4500, and when the compressor output line is equal to what's in the tank open the valve so that you are not putting a greater amount of pressure on your compressor's output stage. your compressor should just hum along. Ok, maybe it worked before and you are having issues with it now, but that's not how you are supposed to do it. Everyone here is just trying to be helpful, so even if you don't agree with them, at least give their advice a try and let us know if it works or not.
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