Swelling the Wood: Fill the barrel with hot tap water to swell the wood and ensure a tight seal, preventing leaks. Leave the water in for at least overnight.
If the Face is Wet: If, after soaking overnight, you see any moisture on the face, let it sit for another 24 hours. We want the wood to fully hydrate and swell before filling the barrel with spirits. Used oak seems to be especially prone to shrinkage and may need more time to hydrate. Sometimes, multiple treatments with warm water are needed to fully hydrate the barrel and seal micro leaks. The wood will continue absorbing liquid for about four weeks.
Draining the Water: After soaking, drain the water. It’s normal to see some black char come out. Gently shake the barrel outdoors or over a sink to remove any remaining water.
Filling with Spirits: Once the barrel is prepped, fill it with your spirits and seal it with the bung.
Aging Beer and Wine: Ensure fermentation is fully complete before sealing the barrel. If refermentation is possible, use a #5 stopper and airlock to allow gases to escape. Once safe, replace the airlock with the bung for aging.
Don't Store in the Bag: To prevent microbial growth, always store the barrel outside of the bag. Instead, fill the barrel with water to keep it hydrated and sealed.
Keep the Barrel Filled When Not in Use: If the barrel is not actively aging, it should be filled with water. This prevents the wood from drying out, which can lead to shrinkage, warping, and leaks. Regularly check water levels and refill as needed to maintain a tight seal.
Headspace: Leave about 5% headspace (approximately 1 inch below the bung) when filling with spirits to allow for expansion with temperature changes.
Secure the Bung: After filling, firmly tap the bung with a mallet to ensure a secure seal.
Long-Term Storage: For storage longer than a few weeks, use a solution of potassium metabisulfite and citric acid in the water to prevent spoilage.