I just kegged for the first time and I'm trying to sanatize the tap lines. This is the first time I'm using a CO2 tank and regulators, here's the one.
I conected the tank tightly to the regulators and opened up the tank. The main filled regulator went to 800. When I opened the individual PSI regulator closest to the tank, nothing happened. I tried several times but nothing worked.
There was a plastic washer that I put between the regulator and the tank connector, was that right?
What is with the screws that point outward that are lose, is there something I', not doing there?
What is it that I'm doing wrong?

I conected the tank tightly to the regulators and opened up the tank. The main filled regulator went to 800. When I opened the individual PSI regulator closest to the tank, nothing happened. I tried several times but nothing worked.
There was a plastic washer that I put between the regulator and the tank connector, was that right?
What is with the screws that point outward that are lose, is there something I', not doing there?
What is it that I'm doing wrong?