Good Morning All, Just hooked up my equipment. Got a Hayward Northstar pump, 1 hp , hooked up to my Hayward EC 65 filter. The pump is supposed to be self priming. Can't get it to draw water from the skimmer line. Just to see how strong it was sucking, I undid the fitting, turned on the pump. There really isn't that much suction from the pump, very minimal. I cupped my hand on the front and this is how I tested it. I tried to fill the line with water after reattaching everything, then turned it on again. NOTHING!!! Any suggestions??? Thanks in advance, J