I haven't decided whether to actually use this but I was sitting around watching the Open and started playing with some spare parts. An old Samcheer case A Nova Heatercore A Comair Patriot 172mm 24v fan Two Eheim 1250s A Criticool Waterplant reservoir Some tubing This is the result. The reservoir feeds the nearest pump which feeds the next one which feeds the radiator which merely loops back into the reservoir at the moment. The intention would be for the radiator to then feed my old Whitewater then back to the reservoir. The radbox would sit next to the actual computer. The big problem with the setup is that with both pumps switched on, the flow is so strong that the system is a bugger to bleed. The reservoir is simply not big enough. To get round that I bled the system with just one pump running. I know the second pump may only be adding a small amount of extra pressure and it's adding some heat to the loop but what else am I going to do with the damn things! They are duct-taped together and sat on a cut up sample of Tempur body-form mattress stuff, no vibrations whatsoever. The fan is powered by the QTec PSU which has nothing else to do so don't give me any grief. I'm running the fan at 12v because the QTec has no -12v so I can't do 24v even if I wanted to and 17v is still too loud. The fan won't start at less than 12v but at 12v it's pretty quiet.