Since the gas is removed as fast as possible without traveling through the charcoal fuel supply a gas cooler is used. It is a pipe inside of a pipe with tangent inlet and outlet on the outside pipe.
Hmm, I forgot to take a photo of the complete cooler. I’ll do that later.
This is the inside pipe. I like to oil it with canola oil at least at the bottom so that it slips into the seal made from tractor inter tube.
Top of inside tube. I hammered the end over on an anvil (lip) so that the top seal, cut from an inter tube, does not slip off.
Pipe being installed, almost installed.
bottom with inside pipe installed.
The bottom seal.
The top outside pipe seal mating surface.
the top with inside pipe installed.