Rainman, thanks for the advice. I got her going today but after about ten minutes she quit on me. This happened twice. I believe air is making its way in at the outlet as only about half of the six inc pvc is streaming with water while flowing. I have seen where you can put an elbow on at the outlet pointing up to create an "air trap". I think I'll give that a shot and see if I can keep her going. Any thoughts? The pond is 12 -14 feet deep.