Carbing 3 gal in 5 gal keg

[carlk47]

My typical setup for carbing a 5 gal batch is too put the newly kegged warm beer into the keezer and carb for 48 hours at 30 psi then vent and turndown to serving pressure at 12 psi. Always seems to work pretty good.

Now I am going to be doing some 3 gal batches that I want to carb in the same 5 gal kegs. Will this same process work or would I end up with over carbed beer due to the lower volume?

I was thinking carbing at 30 psi for 24 hours instead then set to serving psi but just curious what people suggest in this case?

 

[BrocksHomebrew]

Not sure how the volume will affect things, but if you do over-carb it's easy to correct. Biggest concern is to make sure you purge the keg with CO2 before filling, 2 gallons of air could skunk a beer fast.

 

[AnOldUR]

. . . 2 gallons of air could skunk a beer fast.

This can be prevented by kegging in the dark. No one wants light struck air in there shining on their precious beer.