It must set one to two feet above your body. You will have to get a suction in the hose before it will flow down. To do this, fill the plastic hose up with water and let some of it out. This will create suction. Clamp the tube and put one end in the bucket.
Some people are astounded by what comes out.
Seeing is believing. Next, lubricate the plastic tubing which goes into the rectum. Towels on the board help for comfort. Lie down and insert the tube into the rectum. Do not try to hold too much water in the beginning.