http://forums.procooling.com/vbb/sho...&threadid=4686
In the above thread I described how my WC rig went down over the night and I stated that I didn't know how it happened. Well, I just figured it out.
After inspecting the entire system, I found that in the area of hose coming from my WB to my air trap, there used to be slight kinking due to a relatively tight turn. Because I was using such a powerful pump and such low quality (aquarium) hosing (1/2"), the suction from the pump slowly caused the walls of the hose to close in upon itself (this was not due to kinking ... the walls of the hose were completely collapsed upon themselves in a relatively straight area ... the slight kinking got the process started). The excess water was displaced into my air trap, and eventually the walls of the hose caved in. Since the pump could not suck, it couldn't push, either, and a couple of hours later I had a dead pump and quite nearly a dead CPU.
I would caution against using cheap and flimsy hosing in any water cooling project to prevent this kind of problem. I was lucky that I didn't fry my entire computer. Has anybody else encountered this kind of degradation in their hosing?