Good afternoon, I have a question regarding air in the lines. I have a valve that is set to allow equal suction to the skimmer and main drain. I moved the valve to put all the suction to the skimmer to vacuum the bottom. When I did this, air bubbles started appearing in the pump basket window. I waited a few minutes to see if it would clear but it never stopped. I then moved the valve to jus the main drain and the same result, but not as much. When I move it back to the center, no bubbles appear. Any guesses on what is wrong. I was thinking that it might be the O-ring for the valve that is bad. I have a video, but not sure how to load that on this site yet. Any assistance is greatly appreciated.
David E Vergara