Crawl Space Cooler Build

[bigslappy]

[QUOTE=mike8913;2969357]it depends on the volume of the fall. For it to work properly there needs to be more volume of water being pushed down by gravity than the volumne of water that needs to be pushed back up.[/QUOTE

Yes !

i'm talking the two loops flow out of the PC into a 8 inch pipe just at the level of the PC then a straight drop of 7 feet (5 feet of that drop 8" pipe) reducing down in diameter(THE LAST 2 feet of the drop ) every 3 to 4 inches till the diameter is a 1 inch pipe that tee's at that point back into the two loops
then both loops run into a rad , one on each loop (Black Ice GTX-480's) & is pushed back up by a iwaki rd-30 pump on each loop back into the PC

The volume of water in a 8" pipe 5 feet long straight down will supply alot of positive pressure to the inlet of the rads & the RD-30 will create a negative pressure / suction at the outlet of the rad
the up loops will be the diameter of the outlet of the Iwaki's
the pipe between the rad & Iwaki will copper pipe to keep the Iwaki from crushing the tubing with suction
does that make sense ? Opinions are welcome !