I have a regulator but I'm not positive it is a CO2 regulator. I was pretty sure it was, but I needed a part for it and the guy at my LHBS put into my mind that it may be a nitrogen regulator (I did not have it with me), and if that is the case hooking it up to a CO2 tank would cause it to explode. I checked the regulator and it does not have any info on it except that it is a tap-rite. Anyone have any ideas how to tell for sure which one I have? Thanks!