Wayne. I have been trying to get the main suction line open and I heavy snake the line from above near the pump. I didn't have any problems except that I have encountered a solid stop and can't seem to pass it. Next try is going to be a attempt to snake the line from the bottom drain up. The pool is empty. I had serious problems with air leak until I isolated the skimmer line. That appears to be my only suction source. Any suggestions for returning the main suction line at bottom of pool would be greatly appreciated. Thanks. Wayne Towry.