MyQul
Chairman of the Bored
In a sealed keg the beer will last as long as it is under C02 same as any keg.
Using the bottom tap only will allow air in and the beer will start to deteriorate in 2 -3 days.
True but I often drink a MK over 5 days if I close the bung after pouring. Thing is a MK is about 10 pints so thats only 3 and a 1/3 pints over 3 days(especially if its a fairly low abv%). So quite an easy session over a weekend if your planning to drink the whole thing yourself