"ississauga" wrote in message
om...
I am using a propane torch to melt a recently made solder joint
holding together half inch copper plumbing pipes, but the solder won't
melt no matter how long I heat it for. I leaked out the water and
heated once till copper pipe turned red. Is there another way to melt
the solder ?

It sounds to me that the joint was brazed, not soldered. By definition,
brazing is done at higher temperatures than a common propane torch can
achieve.