Once in the BeerTender, your keg will stay fresh for 30 days. If you take the keg out of the BeerTender, you can store it in your fridge for up to one week. You can store an unused keg for up to six months.
The BeerTender has two important features that may cause noise: the cooling system that regularly checks the temperature of the keg, and the pressure system.
This cooling system has two levels:
1) Stand-by cooling. In this mode the fan noise is barely audible.
2) Active cooling occurs when the temperature of the cooling chamber and the keg is too high. Once the keg is cooled to the right temperature, the cooling sound should return to a minimum.
The BeerTender tap has a pump that holds the pressure in the keg constant to maintain the quality of the beer and to allow tapping.
There are three situations where the pump will work:
1) After you close the lid, it will pump pressure to the right level.
2) While you’re tapping the beer – with a full keg the pump will work immediately; in a relatively empty keg the pump will start later or not at all.
3) In stand-by mode. To maintain quality of the beer the pneumatic system keeps the pressure of the keg at the right level.
If you’re tapping a few glasses of beer from the keg per day, the pump will switch on and off briefly – usually around three or four times per day.