Content inside Liquid Output Fitting transfer heat with environment.

It is impossible to get high temperature and low temperature liquid from Liquid Output Fitting right now.

The building itself generate heat when use so you need something to cool it. But because content inside it transfer heat with environment, any cooling you give also cool the content and such, destroy any pipe outside of it.
Even insulite pipe get broken because the content heat exchange before even it enter the pipe.

The same work for gas and solid fitting, but solid fitting mats always in good temperature range, and gas fitting you can cool it with liquid conduction panel.