sigh, this is so frustrating..
i got the regulator only to find out when i turn the oxygen knob (with the regulator on and set to 1/8, or without the regulator attached), no oxygen comes out, nothing happens at all. I can only turn it maybe half a full spin before it stops, and my hardest effort pivots the whole tank even while i brace it between my knees without opening any more - im scared to do it again because it shouldn't take that much effort, should it?
its heavy as hell so either they sold me a defective unit or an empty one that's just heavy as hell. or I don't know what I'm doing. maybe I have to turn the knob behind the outlet for oxygen that has 4 holes on it like a 4 way intersection. no idea.