Tony wrote:

rb wrote:
I'm thinking about how to check out the regulator for operation.

Running it through an open hose you should be able to shut 'er down or turn
her way up, right?


Most but not all regulators will stop the flow when the adjustment is
unscrewed all the way. I would have just turned it all the way both
directions before posting here. Much faster.

I think he's referring to venting type regulators, which I think would
be most common on air compressor regulators. Venting where you can
reduce the pressure downstream without having to release air elsewhere
downstream.