Anonymouse
Sith I care
From the video it looks like it functions pretty well and both perc seem to be firing nicely but obviously you can make your own conclusions.
Having seen that, I'd disagree. To me it looks like the inner circ is clearly firing dry. Use the playback speed control and set it to 25% speed, and you can clearly see all the water is forced out of the inner chamber
The problem is the holes in the outer showerhead are lower than the holes in the circ, meaning the only way vapour can exit the showerhead is if the water level inside it is forced down by pressure to below the top of the exit holes in the showerhead, but this means, since the circ exit slits are all higher than the showerhed ones, that the circ is left "high and dry" in the inner chamber. The air jets coming out of the circ may stir up a bit of water in the small puddle underneath, but they aren't blowing bubbles into it directly.
This could be solved by making the slots in the showerhead higher than the slots in the circ, though, which would turn this into a true concentric double-chamber, double-perc piece. This would mean putting the slits on the sides of the cylinder instead of the "corners" at the bottom (and probably making the slits short horizontal ones stacked-vertically tree-style rather than single vertical slits circ-style), but would mean both circ and showerhead would fire, fully and simultaneously.
If the inner perc was running dry I imagine that there would be a noticeable difference between the water levels on the inside and outside of the showerhead when he stops drawing or at least a period of time where the water tries to reach equilibrium.
There is a noticable difference, though. Try watching again in slow motion?
Also, if you look closely, even when the water at rest in the vid, the circ slits are only just barely below the water level. There's not even enough in there to properly submerge the circ when the water is at rest, in this particular video example, and it can't be submerged in-use since its chamber level lowers so the outer one can rise.
Man that is a sick piece, my ideal height.
And since the mouthpiece is removable, it can easily be adapted to anyone's ideal height. Or the same piece can be your "ideal height" (and ideal angle, spacing, etc) whether sitting on the floor, sitting at a desk, or sitting in an armchair/recliner, despite all these situations varying with posture and personal preference, just by having alternative mouthpieces for each.