I dont think you understand. Its called a Close loop cooler because it comes pre-filled and sealed closed. Water WONT escape from it unless you cut the tubes.
Honestly, if you keep yourself static free, installing a computer is such a breeze since parts are more durable than you think. Sure, still have to be care with the back of the motherboard and video card, but thats about it. There really isnt a whole lot you can forget up when building a pc.