Well I needed to have my steel tank hydro tested so I took the valve out. It was a chore to removed but I got it out. The threads are intact. So I got my new reg today and went to thread it on but it will not thread all the way down. So I got the old reg and tried that....same thing. Looks like they used red locktite at the factory. So could I run a thread chaser to clean the threads? Or is there more going on?