I'm not sure. It might be borderline for larger than 1/2 copper lines.
I've used MAPP gas before, when installing hotwater solar using 95/5 solder (95 % TIN) on 3/4" copper pipes and fittings.
But, after watching some videos of HVAC braze jobs, I can see the pipe and fittings glowing cherry red..
The filler metal used on a lot of those jobs, was 15% silver and 85% copper. (Very costly stuff).
If I decide to DIY a heat exchanger, then it's doubtful MAPP alone would be the way to go..
|