I've had my Liquidator now for a little over a month, and have a *love/hate* relationship with this thing. Simply put, I love it when it works, and hate it when it doesn't; and for my system, I never know (day-to-day) when it's going to work. For the last week, it has not worked but sometimes I can kick-start it by partially closing the suction valve. Strange to me that closing the valve doesn't always work, not to mention the LQ system as a whole not always working. My theory is that I don't quite have enough suction but, also, since I'm going in through the pump's drain plug, I'm thinking churning water, as opposed to flowing, may be the main culprit for inconsistent performance.
So, unless anyone has a brilliant idea (which happens often on this site), I'm going to drill and tap into the pipe going into the pump (like the LQ instructions say to do). So, my LQ Outlet line will go into the pipe that feeds the pump, as opposed to the drain plug.
Here's a link to my other (related) thread for other details about my adventure with this system.