What about a 1.023 beer? I keep one in for my wife. She likes the table beersI have no problem hitting 1050 no sparge at 68% efficiency3% table beer at 7°?No sparge all beers? Even low gravity beers that would be near 5qt/lb?
Are you purging the pump and line with bottled co2? If so, you're not worried about oxygen pickup there.
You shouldn't have to exceed 3 qts/lb down to around 11 °P.
SMB will be providing active scavenging.