【Improved Performance】Yardwizard propane torch head SQ8000Pro ... this multi-purpose map gas torch kit is not only suitable for welding, brazing, soldering and plumbing, but also nice for ...

MAP stands for methylacetylene-propadiene propane. You may see MAP gas labeled as MAPP or ... If you're not careful, the heat from your torch can re-melt the solder at the older joint.