pigfoot
Dabs are vapor too!
I found a rattle can fc-710 what do you guys think? I skimmed through the threads but could some one enlighten me as to what the ball does in there? http://m.dhgate.com/product/2015-new-arrival-glass-water-smoking-pipe/243067453.html#pd-019
Mine is still on the way, but from watching the videos, my take is this: the vapor path is basically an inverted question mark. The glass ball closes off the bottom of this. As vapor flows thru the stem, it causes the pressure within the stem to decrease, pulling the ball up, and opening this "valve". Cool water from the bottom of the can is mingled with the vapor as it rises.
How does the ball affect the diffusion pump? If it has minimal or no affect I'd rather not listen to a rattle
I believe it's an integral part, allowing cool water to mix with the vapor stream. If you don't like the sound of it, but still want max flavor, consider one of the small, classic oil rigs.
Example
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