Mega 20 Oxycon Issue
 

I got a Mega 20 oxycon in September, just unpacked it an moved it into my renovated studio last week. I've used it twice, and each time it works fine for about an hour, and then it seems to almost turn off and the oxygen level in my torch drastically goes down. This lasts briefly, and then the oxycon kicks back on, but only at about half the force as before. It is not enough to run my Hellcat. It also gets very hot (the oxycon). Is this a normal thing? I don't feel like it is. I have a message in to ABR where I bought it from.