I got my CO2 tank filled a couple hours ago, it's showing 900 psi internal. But when I hook the hose up to the keg (I am hooking it up into the IN) I get nothing. I tried just turning on the gas and pushing down on the pin, and still nothing. The out on the keg works fine. I sanitized and managed to create a syphon to get the water out.
So what do I do?