Side note: I'd advise purging that collection ball with an inert gas, heavier than air, like CO2. Otherwise when you reconnect your empty ball you'll be bubbling air right up through your wine. Personally, something I want to avoid.
Yes, using CO2 to purge/blanket vessels in wine making works as long as the pressure in said vessels is low and/or the temp is high. CO2 solubility in water is a function of both pressure and temp.
I actually purge the head space of my fast ferment conicals with CO2 because of the very large...