I'm looking at water cooling my new machine... as soon as the SR5 is out anyway. I have two rads (360mm tripple and 280mm double) and I'm going to cool both the CPU and GPU. My question is... head pressure?! When it says x amount of feet or meters, Is this only inclusive of going uphill only, or is this the whole loop? I ask because it's been a while, and I really have been wondering. I mean, if my 360mm vertically mounted rad has say 15 channels to go around won't that mean the rad alone would be 15 feet or 7.5 if you only include when it goes up the rad?