Soldering copper pipe: Tips and Tricks

Choosing Your Tools: Propane vs. MAP Gas

There are two main fuel options when selecting a torch for soldering pipes: propane (in blue tanks) and MAP (in yellow tanks). MAP stands for methylacetylene-propadienepropane.You may see MAP gas labeled as MAPP or MAP-PRO. There are some distinctions between those acronyms, but for DIY purposes, we can treat them as synonyms.

Propane is less expensive but generates less heat. The higher heat of MAP typically makes things go faster, but both work just fine.

“We used propane when I was plumbing in new construction,” says Means. “But in the service and repair side, we use MAP gas.” The reason? Modern code requires lead-free solder and brass fittings on supply lines. Lead-free materials typically require a higher heat level.

“Lead-free brass fittings take much more heat than the older style brass fittings,” adds Means. “So MAP gas is a better option when soldering copper to brass. It burns hotter and makes soldering a bit quicker when you get into larger sizes of pipe.”