Barrels can come in many sizes. The barrel should function. When you have the barrel, you’ll notice there’s a cork on the front. The valve is clearly visible. To make sure that there is an airtight seal, you will need to disconnect the valve from its top. If you blow in the seal to verify the seal is indeed an airtight seal. They swell when liquid is put into the seal. The swelling is similar to natural. The swelling is what causes the seal to form. It is a matter of water. could use a tap or even filter water and then will fill the barrel. It’s possible to fill the barrel up with water, in a tiny amount, or more. It will permit you to check how well it expands. It will show the normal leakage of water. If there is a leak in the water the water should be gone very quickly. The leak should be gone within some hours, at the very least. The seal will form within about an hour or so. To see its full effect you may add water. The barrels are able to be kept well-maintained and fresh for a number of years. The aging of your whiskey will depend on the air-tight sealing in the barrel. givxxmeuu6.