I have an IG pool and we have just installed a new Pentair Superflo High Performance Pump. It needs to be primed to get going. I have poured buckets! of water into the basket and each time I turn it on the water disappears. The pump is slightly above the pool (ground level). Sand filter, vinyl. The instructions speak of the air intake valve and to open this to remove air. Question: where on the pump or piping is this valve? How much water should be needed? What should my filter be set at to do this?