Freaking Murphy's law!

[Brewing Clamper]

It stands to reason that the day I have 50+ people coming over for a party my CO2 tank hits the red! It's a 20lb tank and it just hit the "no more liquid" point. It basically jumped in one pull from 800PSI to 600 into the "order gas" red line. So, do I have enough gas to push 4 kegs tonight? Should I just forget whatever's in there and take it in for an exchange now?

 

[Yuri_Rage]

It's about done. You probably have enough gas to push a keg or two, but why risk it? CO2 is cheap - exchange now.

 

[Brewing Clamper]

Anyone know the actual volume of a 20 lb tank?

 

[Yuri_Rage]

A rough measurement yields:

769 cubic inches
12.6 liters
3.32 gallons

 

[Brewing Clamper]

OK, slap me if I'm wrong here but:

12.6L of 600PSI gas = 25.2L of 300PSI = 50.4L of 150PSI and so on... I need about 80L of gas to move 4 carbed kegs at 12psi, I should have over 200L of gas in that tank at 14psi... or am I making MathMagic here?

Edit: The reason for this is that every place I've called closed at noon today... D'oh!

 

[david_42]

Go for it. By the time you get towards the bottom of the kegs, people won't notice the beer is getting flat.

Seriously, I've carbonated a soda keg with a "inthereddead" #5. That's about 5 volumes.