I just got my Clarke 180 EN, and was a bit surprised by the gas connection, which is a hard plastic hose that runs all the way to the torch. Is there a special adapter/fitting needed to attach this to my regulator? (I don't need the entire Clarke gas kit because I already have the regulator itself; I only need this little adapter.) Is this adapter unique to Clarke or can any welding supply shop (or maybe plumbing shop? It looks to me like some water hose connections I've seen for humidifiers) provide it?