[airspirit]

This is a modification of my "ultimate bong setup." Instead of using a expensive evaporator, we're going to do it old school with showerheads. This method requires three pumps: one small cheapy that pumps 100 GPH or so with next to no head (for the heat exchanger), one that provides 300 GPH at 6ft, and one that provides 300 GPH at 9ft.

We are going to build two vertical towers of PVC, both with Y's at the bottom, and both with large reservoirs at the bottom. The cold reservoir should be insulated to protect the cold water, as should all the tubing to and from the heat exchanger, to preserve maximum efficiency. At the top of each tower will be a high flow shower head, and the two tops will be ducted together. The cold side will function like a standard bong, except that ALL air/steam/droplets will be ducted to the second "hot" tower. In this setup we are not worried about water loss, so crank up the most potent air pusher you can find, cause we want to "Pump! *clap*, You Up!" Slap a HEPA filter on this bad boy, cos we don't want to get our works all dirty, now do we?

The interior of the first bong should be empty. No ping pong balls or whatnot will be aiding evaporation. Since we have maximal air flow keeping it real for us, we will just deal with the evaporation we get. We need the airflow for this to work.

The second bong will be sucking rather than pushing. This one will be filled to the brim with ping pong balls (a screen is on the bottom of the pipe and protecting the "Y" to prevent ingestion into the radiator loop or fan grindage!). The exit fan should be low power (think Panaflo L), pushing out, and again, slap a HEPA filter on BEFORE this fan. Also, have a layer of scotch brite or another porous, non-rotting material inbetween to catch every last bit of steam possible.

What to do with the hot tower's shower head? We're going to hook up a large radiator and the strongest of the pumps. On the outlet of the radiator, you want a "Y", with one tube going to the shower head, and the second feeding back a small, regulated amount of coolant to refill the cold tower's reservoir. This is going to be a miniscule amount of coolant, about 1-2 GPH, as the first won't be evaporating like crazy, but will be pushing a decent amount of water out due to the uberfan pumping into it.

The hot tower will serve as a condenser for this system, with the wet ping pong balls attracting as much water as possible, and the warm water being recirculated through the rad multiple times before their return to bong number one (the water will be almost exactly room temperature). The air that leaves the hot tower should be as dry as possible ... you may want to extend the Y section of the hot tower outward to help get every last bit of coolant possible.

So now that we have this water chiller, what the f*ck do we do with it? We bolt it onto our computer, of course!!! Through a heat exchanger attached to pump #3 (the weak one), we draw as much heat out of our CPU loop as possible, recirculating that water into either the "hot tower" or the "cold tower," as you see fit. If it goes to the hot tower, make sure you open the valve more on the feeder loop to the cold reservoir.

The last bit, not pictured, is to have a large plexi-tank full of water that feeds the hot tank as necessary via float valve, keeping it full. This tank will rarely need topped off, and is a good guage of the water level in your Two Towers. There will be minor water loss through this endeavor, but not nearly what you would get with a standard bong.

Imagine what I could have done if I was a stoner ... I would have been on the cover of High Times.