To everyone who tried to help in my quest for MAPP gas in the St Louis area, in larger quantities than 1 lb -- thanks! I just got a response from Praxair, the big gas supplier around these parts. Here's what they say: "We recently quit filling MAPP gas at the St Louis Plant and have gone specifically to Propylene gas. I am not aware of any other suppliers for MAPP in the St. Louis area other than the disposable 1lb cylinders. " So that's one mystery solved! Now, who knows whether Propylene gas is compatible with HotHead torches? The quest continues...
- Steve R St Louis