<HTML><FONT FACE=arial,helvetica><FONT SIZE=2>Help! I am going to braze a fitting to my copper exhaust pipe. I have done
<BR>a bit of brazing with a MAPP torch but I've never used acetylene with its
<BR>2-tank system. Could somebody give me some basic guidance in determining the
<BR>mixture, safe handling, etc? Peter Goeden</FONT></HTML>