You need a regulator on the CO2 tank in order to pressurize the keg. I pressurize mine to anywhere from 10psi (serving) to 30psi (carbonating). If you had a regulator there are two gauges which shows you the internal tank pressure and the regulator (output) pressure.
Primary : Nada
Secondary Edwort's Apfelwein, AHS Titannia Wheat On Deck: LHBS IPA [Recipe Unknown], Corona Clone (Lawnmower Beer)
Bottled: Spicy Orange Pale Ale, Stone Cold Brown Ale Kegged: Spicy Pumpkin Ale
"When I read about the evils of drinking, I gave up reading"