Instead of using water to refil that ol' water cooler, wastin money on water bills, lol, simple pee and a cup and use that! its ingeniouse i tell you ! saves you money and makes you feel better!
It would only work if you are healthy. And any potential leaks would mean you'd have to get rid of your hardware for good. Maybe even call a dangerous materials recovery service.
A gallon of distilled is less than $1, and is usually more than enough for 3 loops. It's not like watercoolers are paying tons of money to fill their systems....