If you have the 2 piece venturi. tighten down the outer nut ring. if the venturi still spins freely then you need the "gasket" even in the sump. Otherwise a little water will bypass the venturi. if it feels tight ....
<span style="color: black;">Funny enough I came back home today and found some foam forming... I guess it finally passed the break-in period.</span>
<span style="color: black;">On a side note, it is a NW not venturi. The instructions are to put a seal only on the pump output. When I first set it up, I mistakenly put a seal on the input as well and didn’t get any bubble…</span>
<span style="color: black;">Thanks all for the good info and suggestions.</span>