Wall mounted water cooled PC

“Water”-cooling is frequently a misnomer, as many of the fluid cooling systems run with a non-conductive mineral oil-based liquid in the tubing. There are still many that have a base of distilled water, which is why the tubing and connectors are designed to be as robust as possible in order to prevent leaks. Plus a setup like this actually would make it easier to detect a leak, as everything is exposed and ready for inspection rather than being tucked into a case.