Toller wrote:
you do need a different torch head, oddly enough mine mapp is non
adjustable for flame control. home depot doesnt carry a adjustable
one
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I use the same torch for both. It seems to work out okay.
What is the the difference?

MAPP gas is made by combining liquefied petroleum gas with
Methylacetylene-Propadiene. MAPP gas burns hotter than propane. IIRC,
propane is close to 4000 degrees, while MAPP is about 5300.

You need a certain amount of heat to properly sweat a joint. If you use
propane on a 1/2" fitting, you can get there. With the lead free solder,
you need a bit more heat so MAPP gas willl get you there faster, expecialy
on larger joints. While it is possible to overheat a joint, if the flame is
hotter, you merely hold the torch a bit further away and heat it for less
time.