Not sure if this has been discussed here before but according to the Coolit Support Manger the Rad hoses should be on the bottom when installed. Having them on top will cause all hell to break loose:
I understand your comments. Your question about the preferred installation was prior to my coming on board with CoolIT Systems. Your question may have been misunderstood.
If you run your PC system 24/7, having the radiator installed upside down should not be an issue as the air bubble mixes with the coolant. The issue comes into play when you turn your PC system off when it is not in use., air rises to the top of the unit, then turning in on again.
I am merely pointing out that if you wish to use a liquid cooling product which uses a radiator, you should pay attention to this.(strictly for your information)
Thank you for your patience,
Service and Support Manager"