Replace the lid, add the bung and air lock and place into a cool, dark place.
Prepare your other wine making supplies for the home brewer by sterilizing the carboy, length of vinyl tubing, bung and air lock.
Push the air lock into the bung and place the bung into the hole in the lid of the fermentor until snug.
The general method followed is to fill the casks to the bung-hole and to keep them full by an occasional addition of wine.
The secondary fermentation proceeds slowly and the carbonic acid formed is allowed to escape by way of the bung-hole, which in order to prevent undue access of air is kept lightly covered or is fitted with a water seal, which permits gas to pass out of the cask, but prevents any return flow of air.