Ok Guys I found this amazing video for how to water cool your computer.
I am posting it here, so anyone who buys such a system can understand how water cooling works if they plan to use it. I had no idea about this and as @ jwatte mentioned, I thought to do some research.
I am most probably not going to use it, it is too messy for my place and with dust that comes into my house, It is never going to work. I need that flexibility to move and turn my cabinet sideways and around to add and remove parts on-demand, dust parts and add things, which will be impossible if custom cooling is added.
It looks nice though and also saves space and removes the CPU and GPU fans.