Not clear on how to adjust pot pressure blaster

Bill Crowell said

Brilliant explanation, my68barracuda. Thanks a lot.

May I ask a follow-up question? It takes about 10 seconds after I open my cougar valve before media starts flowing out of it. That wastes quite a bit of air. What do you think would be causing this?

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It is taking a moment for the media to start dropping from the tank, and get through the media valve, give the tank a kick or a rock as you open the blasting valve. The media stacks up and locks together in the tank so it needs to break free before it can move. If you will be doing a lot of blasting putting a vibrator on the tank down low by the discharge will save a lot of aggravation.