easiest way to drain a watercooling system?

[breamy1990]

as title, got a few more bits to add to my watercooling system e.g. graphics card block & temperature indicator

i also want to replace colour of coolant

so whats easiest way to do it

 

[w3bbo]

Unhook the lowest barb in your loop then drain off, let mavity do all the work.