The start point (copper part) must be higher than the end point (end of hose). 2.) The end of tube must be lower than the self-priming pump before siphoning will start. 3.) Submerge the self-priming pump into liquid that is to be siphoned.

To begin, use an up and down motion to prime the hose. Some refer to it as a shaker or jiggler for this reason, but a more deliberate, downward motion, and then quick upward motion works best. Each time you thrust downward, liquid will enter the tube, and when you move back up, the valve will shut, and prevent it from leaving.