Jim, I use it horizontally in a propane tank with a Bain Marie as a hopper. At first I used the plain nipple wrapped in stainless sheet stock. Then I changed that to a ceramic coffee mug with a 1" hole cut in the bottom. That is the one that caused the high temperature paint to burn on this picture. Instead of going out the hole in the mug, the air was backing up to where the open end of the mug was against the tank.
I solved that problem by wrapping the steel pipe covered with the stainless with high temperature ceramic wool cloth and stuffed the whole works into the ceramic mug and screwed it into the fitting inside the tank. That worked, but last time I dumped out the charcoal and cleaned the slag off the end of the mug at the exit hole, I cracked the mug. (Put a stainless hose clamp around it, and put it back into the gasifier.)
The hopper on this was a stainless steel Bain Marie which I TIG welded into the top of the propane tank to be able to quickly add more charcoal.
The lid on the top is a top from an old electric percolator coffee pot. The gasket is a piece of silicon baking sheet. (I also used a mouse pad.)
The arm that holds the lid down is from an old recliner. This was all written up on the Yahoo Charcoal Gasifier Group moderated by Gary Gilmore. (No postings in a very long time on that group. Everything is on DOW.)
I haven't used these before because I recently bit the bullet and bought a bucket of refractory cement from Amazon.com. I'm hoping that the 2200 degree stuff isn't going to immediately melt into a blob. I suppose I could wrap it in the high temperature ceramic wool stuff...I bought a large box of it and split it with Martin Payne.