I learned the hard way. Water dripping through the second floor to the first floor was not so much fun. It was a major nuisance but I managed to plumb my RO/DI system under the bathroom sink. Now I set the jugs in the shower and let her rip. I set an alarm but if I nap through it, I don't have a new indoor swimming pool.
Ouch! Thankfully our basement is unfinished, so its really just about cleaning up the mess and waste for me. Funny thing is I have the float valve sitting on a table next to the unit, plus have some of those water detection alarm things still in boxes lol. Laziness gets me every time