OK, well i have a size y argon cylinder, and i have welded for about 10 minish at just under 10lpm. The problem i wonder about is that the pressure indicator has dropped about 15-20 psi already from a new cylinder. When the key is open and the flow rate is set, but i am not actually welding just setting up jigs... should the flow rate show anything above zero as gas shouldnt be flowing, as when i stop welding the flow rate on the guage goes up a bit. My regulator is a 2 guage one not one with the long vertical flow meter. Im also not sure how to check for leaks in the system. Thanks