The idea is basically a custom made pump housing with impeller and magnets on the underside of the impeller. Then a normal 120mm computer fan also with magnets mounted on top of the blade assembly. The pump assembly is mounted on a fan guard and then screwed onto the fan. So when the fan is running then so is the pump. So now you can run your liquid cooling systems fan and pump using only one motor plus make the whole thing from easy to find parts and if you are a DIY then you most likely have these parts. The only thing I needed to get was the magnets which may be about $2 dollars worth. I did test this unit based on test data from a high performance liquid cooling system for a high end high priced gaming computer. The pump & fan combo pictured was tested with a water block and exchanger which is no longer attatched.
If my instructions are not complete enough feel free to e-mail me with any questions. Test results are on the following instruction pages. Thanks for looking and have fun. I do have to say though buld it at your own risk I cannot be responsible for damage to yourself or parts you use. I have included a rar. file with the same instructions and more pictures.