I just installed a new Hayward EcoStar pump and re-plumbed all my connections to the filter, waste, inflow, & outflow. However, I cannot successfully get it to prime. I filled my outflow pipe w/ water & reconnected before priming. I have filled & filled & filled my inflow side (via pump basket) and it still runs below instantly when it starts to "auto-prime." My filter is set on Filter. What am I missing/doing wrong?