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What is the difference between a party pump and keg coupler?

Party pumps dispense beer by use of outside air pumped into the keg via a hand pump.

This type of dispensing is appropriate only when the beer will be consumed within a few hours, because the outside air will cause a bacteria reaction that will spoil the beer within 8-12 hours. 



Keg couplers dispense by use of pressurized gas from a gas cylinder. For ale and lager type beers, carbon dioxide (CO2) is used. For stout type beers, a mixed 75% nitrogen / 25% carbon dioxide gas is used.

This type of dispensing will allow the beer to remain fresh, if kept at the proper temperature and pressure, for 45-120 days.
 
 
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