Hit the Head! has an innovative interior water perc pipe design. Smoke enters from the bowl into the first chamber, where it is water filtered. While that is happening, the water and smoke from that chamber are being pulled into the second chamber simultaneously with swirls and churning, until the water level goes down far enough that the lower chamber “flushes”. Once you have completed your draw, the water will settle, and slide back down the “drain” to the lower chamber again.