Proper co2 pressure question

[bigmovieboss]

I just converted a fridge. Hooked up my first Co2 tank - double gauge. On a full Co2 tank, what should be the initial PSI reading? Right now I am at 500 psi (in the red zone).

[Scott Zuhse]

If your cylinder is inside the kegerator, the high pressure reading will always read in the red zone due to the cold environment. You will not know when the gas is emptying until all of the liquid is gone. This is when the needle will begin to drop. If the cylinder was placed outside, the needle would read around 850 PSIG and would not start dropping until the liquid CO2 is gone.

Scott Zuhse, Instructor Micro Matic Dispense Institute