Thanks for the reply, think I was planning on doing things slightly different. Over the course of the day I have been trying to plan my best route and I believe that I should do things like this : My Pump/res combo lies at the lower right of my case, in front of my 360 rad. The outlet of my 360 rad will be at the top and will feed into the inlet of my Pump/res (EK Xres 140). At the inlet I plan to have the Y splitter set up there with one feed as a drain. Space is limited so I don't believe I could set this up on the slightly lower outet port. Hopefully this will work.