Speidel 60L + Fermcap

[silver02ws6]

I searched for this but couldnt find exactly what i was looking for. I know that the Speidel 60l is advertised as being for 10 gallon batches but I assume that with some Fermcap added you could easily do 13 or 14 gallons. Is this a safe assumption? Can anyone confirm or deny?

 

[kchomebrew]

Use a blowoff tube and you can easily do 13 to 14 gallons I have 2 of these and it's no problem ever.