This is not the Pit of Sarlacc(Jabba the Hut reference). It's a galvanized steel fitting that had veggie oil sitting in it for the last 6 months. If you run vegetable oil, you have seen polymerization of vegetable oil on your tools, fittings, tanks or engine externals. If you make your popcorn the old fashion way(in a pan with veggie oil), then you may have also noticed that forming on your cookware. It's gooey, greasy nasty stuff. Polymerization is a reaction that requires oxygen. The goo forms more rapidly with the presence of heat, light, and certain types of metal like copper and galvanized steel. You can learn all about it by reading a report titled: Vegetable_Oil_as_Fuel by Joe Beatty.
My personal strategy to avoid polymerization would be to use an aluminum, stainless steel or plastic fuel tank. Also, avoid copper anywhere in the system. Another technique is to avoid excess heat. For instance it's best to heat the oil as it's being drawn from the fuel tank(what our Hotstick was designed to do). Don't to heat the entire tank. Do you have any wisdom or stories to share on polymerization?
-Jason Jelonek
