When putting together a water loop in a PC, you need the correct fittings.
In a PC, fittings are what hold all your tubes together and connect water blocks to pumps and radiators. It's not enough to simply attach a soft or hard tube to a block and call it a day. You need to add a fitting to create a water-tight seal. When working with electronics and liquids, you need to be double (and triple) certain no leaks will occur. There are a number of fitting types available, as well as sizing and materials.
Here's what you need to know.
Full story from the WindowsCentral blog...