Inside the keg, there's a long tube of metal extending from the valve to the vessel's bottom. To get beer out of the keg, gas pressure is applied to the top surface of the liquid, which presses the beer from the bottom of the keg up through that metal tube and out of the valve.

How do kegs get filled?

keg is below the pressure in the supply keg. The fill stop assembly has a small hole - that meters the gas from the receiving keg - slowly. This allow the beer on the supply side - to slowly fill the keg as the gas in the receiving side is slowly released - minimizing foaming.

Do you save money with kegs?

When you buy a kegerator for your home, you're not only able to conveniently store large amounts of cold draft beer, but you can also save approximately 40-60% in costs, compared to buying the same volume of beer in cans or bottles. ... The savings can be even greater for some brands of beers, as well as various keg sizes.