I would think that the line would be to small and it would take forever to fill a mug. Not to mention all the aeration that would take place.
It could probably be reworked and be acceptable though. Why not try just running a regular tap line to the water dispenser and modifying the Tap to...
Not only did I make lables I also created a ficticious brewery that my internet radio station plays from.
You can check out samples of the lables on the homepage
www.jamica.org