I just installed a new intelliflo VS pump and it works great at high speed, no bubbles, but at lower speed (ie 1700 rpm) it starts to get some air in the basket that eventually drops several inches. Any thoughts?
Its only bad if there is no water in the pump basket but a little air won't hurt. How quickly does the water level drop 2"? You could just need a little pool lube on the lid gasket.