When I moved into my current home, this is what I found under the sink in the unfinished basement (see photo attachment). I have confirmed that there is no power going to it so, there is no sump pump. Basically, there is a hose attached to the bottom of the sink and it is connected to that small bucket. There is an out hose that goes up, through the wall, and then down into a cutout in the cement slab just big enough for the house. I assume it is going into the septic system. How is the water able to go up, and then down, as it leaves that bucket? Certainly not gravity. <scratching my head>.