I just bought the Bestway flow clear 200gallon sand filter pump. i question is the 2 screens inside the pool Labled the letter 'B' am i suppose to feel the suction with my hand ? the water does come out the return back into the pool pretty hard and the gauge on sand canister does read 4 lbs of pressure. I just thought I would feel more of a suction of the water being sucked into the filter pump. Please let me know if this is correct.