Due to extreme weather conditions, this time of the year is hard on downtubes inside of kegs. If Beer Dr. suggestions do not correct situation, as USMC indicated, internal downtube may be split. This is caused by unused product freezing in keg as it is stored outside. Keg is unknowingly refilled and gas pushes beer down to the split and then it is over. Turning the keg sideways simple buys time.
Scott Zuhse, Instructor
Micro Matic Dispense Institute