[stevefry]

I am wanting to brew a bock and in the past, I have brewed it in the winter, in an unheated garage, using an electrically heated control box for temperature control.  I was wanting to try using a corney keg, if I can find a lid that has been modified to accept a stopper and airlock.  Has anyone tried this or know someone that has?  Steve

[Jeff M]

Do you want to ferment it in a corny or cold condition it? 

[Stevie]

 You can wedge a small stopper and airlock in the prv in the lid or use a gas disconnect and tubing connected to the gas post as a blowoff.

[brewinhard]

Are you talking about performing the primary fermentation in a corny keg, or lagering in the corny keg?

[jamminbrew]

I have lagered in corny kegs before. Just like Steve said, I put a connector on the gas-in post with a short length of tubing that fed into a little bucket of star-san. I've had great results.

[brewinhard]

If you are lagering, then why do you need to attach an airlock or blow-off tube?  Lagering is simply storing the beer in cold condition for a period of maturation time.  When I brew my lagers, I ferment in glass for primary, then immediately close transfer to a corny keg and put it in my fridge for lagering. 

[HoosierBrew]

If you are lagering, then why do you need to attach an airlock or blow-off tube?  Lagering is simply storing the beer in cold condition for a period of maturation time.  When I brew my lagers, I ferment in glass for primary, then immediately close transfer to a corny keg and put it in my fridge for lagering. 

+1

[stevefry]

I am wanting to cold ferment and condition

[beersk]

He's talking about primary fermentation in the keg. I do this exclusively and it works great. Like others said, use a gas disconnect and a piece of tubing clamped to it, run it into a jar of sanitizer or water. Works great and you can do a closed transfer to your serving keg or bottling keg. No air exposure...

[stevefry]

Thank to all that responded.  You gave me an easy solution. Cheers.