Overcarbed keg pours only foam

[DiscDoc]

I kegged 10 gallons of a lager I brewed. I force carbed the two kegs and drank one and I connected the other to CO2 at 30 psi. Unfortunately I forgot I had it hooked up and left it for 3 weeks. Now it is pouring almost pure foam. I opened the top up and let it sit for 30 min until the head in the keg settled but it is still pouring 80% foam. Any recommendations to save this. Thanks

 

[brewbama]

Pull the purge valve for the next few days until the carb level is where you want it.


Sent from my iPhone using Home Brew

 

[LLBeanJ]

Take it off the gas and vent the headspace several times over the course of the next couple of days. After a half dozen times, put it back on the gas at serving pressure and see how it pours. Repeat the process until it is decarbed enough for a foam-free pour.

 

[chickypad]

You can also try this.