when the pump is on, it pumps the water up into the modded paper shredder bin thru the top bulkhead. the water then fills it up and goes back down the crude ( but it works ) durso. that little hole at the bottom of the pipe will let the water back into the tank slowly when the pump shuts off and the water goes below the durso pipe. (well from looking at the pics, thats my opinion). anyone else have a theory on this?
EDIT: sorry found the rest of the pics so i modified this post a little