I have the same pump and the hose that wraps around the black turning piece has to be the exact length or it will not pump, also it will have air bubbles and will take some time to pump all the water up to get rid of the air bubbles. Make sure it is plugged it all the way also. My husband took the end that goes onto the rigid hose off and sucked the water up to that point and then reattached it so it would not take so long. The pump is great when you get it going.