Unfortunately, that bucket won't fit in the sink! It's kind of a small sink. My 3 gallon water bottles do fit, which I use for topoff water. I actually timed it this weekend on the 5 gallon. The sink is right by my office, so if I run the unit while I'm working, I should be okay - unless I get distracted and switch computers and start playing on 3reef and not watching.....like right now.