how does a perculator work in a bong?

usually there's two part to a perc. The perc and the ice catcher above it (3 little bumps to keep ice cubes in place)

a perc essentially slows the air/smoke down by drawing it to a narrow point (the laser slits) and then expanding it back out to the uptube. This allows the smoke to thicken giving a stronger hit.

because cold air sinks, the air beneath the ice will collect and thicken thus cooling the smoke and slowing it down further.

Also, because the perc loops downward, it will act as a second bubble bong as the cold, melted ice collects.

Happy smoking!

heres a pic of mine. might make more sense with a picture.

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A Fine example.

There's also ash-catcher/precoolers. They are sometimes mis-called perculators as well.

another example

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ah now i get it! thanks alot for all of you that helped! ill go get myself one of em

illnillinois:

You know you are supposed to put water in a percolator, right? It is a place for it to bubble again, in the tube. Its amazing. Your way might help, but try it with water in there.