Hello. We are recent pool owners after a move a few months back. We just had all of our equipment replaced. Our Jandy ePump fills with water under normal operation. When we attach our pool vac, through our skimmer (after purging the air out of the lines first), the water level drops down about 25% in the pump. What are we doing wrong? I have tried it with both directly connecting to the skimmer and through a Pentair Rainbow Vac Mate connected to the skimmer. Any help will be greatly appreciated.