The only time I have seen hydro tourches, the flame produced was not a tight little blast flame like Oxy-ACC. It was a large flappy flame. It is SUPER hot, but they were not very controlled. It is often used for gold 'melting' after the gold has been chemically refined into 24K gold 'powder dust'.
They may make different torch heads for hydro. I really do not know. But from what I have seen, in no way would I use that for brazing.
Hillbilly Rebel: Unless you are one of the people on this site who are legalling distilling, keep a low profile, don't tell, don't sell.