Originally Posted by mpsd
Why would you need to chill it? And when? Before or after filling it? Sorry for the noob questions, just curious. I have never filled a CO2 tank myself and can't really recall someone doing it when filling one at the fields.
If the tank isn't cold, then the co2 will expand and over pressurize inside the tank, which isn't usually dangerous, it just keeps the tank from filling.
The colder the tank is to start, the easier it is to get it to fill with liquid