I was working on a 1″ copper pipe the other day with my little boy. he was at the other end (it was a long pipe)I went to his end to get the Oxy acetylene & prepared to weld a joint. — Man you should have heard the noise, the pipe almost tore off the wall, when I was game enough to come back to the job, my boy was in stitches & wouldnt stop laughing. What did I do wrong???? Argus Tuft