I've noticed my gas consumption seems high with my new EXT, so I stared looking for leaks. I found that if I disconnect the hose from the welder and hold my thumb over the end and shut off the tanks, the pressure holds, if I hook it back to the welder and close the tanks, the pressure drops to zero in about 10 seconds.

Are these solenoids repairable or adjustable?

Does it need to be replaced?