Imd
I should clarify that the drain kit I referred to is the weldless bulkhead option 3 with the EL barb. I centered the hole in my BC 1044 pot 1-5/8" from the exterior bottom. This put the barb opening approximately 3/16" off the interior bottom of my pot, so that the surface area of the imaginary cylinder through which the wort must pass entering the port equals the surface area of the port opening. My goal being to not restrict the flow while minimizing the liquid left in the pot. I can pick up all but a cup of water or a quart of wort/trub. My runoff did not appear to pick up any trub or hop pellet particles which weren't already still in suspension
I also downsized my whirlpool arm to 1/2" ID, instead of Bobby's standard 5/8", on the assumption the Chugger would still have sufficient pressure, even though magnetically coupled, to accelerate the wort though the smaller diameter tube. So far I am happy with that choice.
And Kingbogart is correct that the pump connection kit is what you need, not the add-a-pump.