Hey LilDaddym, I tested the system on a flat level (checked) surface with my topsider. I clipped the tip of the hose on @ a 45* angle and then cut the bottom half of the point flat. I then sucked out everything I could (in no hurry and let it drain for over 20 minutes continually sucking off and on), and then jacked up the drivers side and drained what was left in a 11-1/2 oz campbells soup can. There was very little (I wrote something in the forum mid last year about it) and it (if I remember right) less than 1 oz in that can. I had the can in a larger pan but none spilled outside the soup can. I had it jacked pretty good you could tell it was fully towards the drain plug. So, it drained for quite a while, sucked as indicated, jacked to flow to the drainhole, and only got very little out. I'll not need to remove that drain plug again for quite a number of years, for sure!