On the right hand side of the kitchen corridor is a large stack of barrels, which may seem unimportant to most students but which are invaluable to the badgers of Hufflepuff. The entrance to the Hufflepuff Common Room is located just behind these barrels.

In order to reveal the entrance, one must tap the barrel two from the bottom, in the middle of the second row, in the rhythm of 'Helga Hufflepuff.' This will make the barrel's lid swing open, exposing a crawl-way that will lead to the common room. However, if either the rhythm of tapping is wrong or the wrong lid is tapped, the intruder will be doused in vinegar and barred access.

The entrance to the Hufflepuff common room is the only entrance which is repels intruders AND bars access to those who don't belong. If you are waiting on a friend from Hufflepuff, you can lean against one of these barrels and wait for them to appear. Don't try to sneak in, though; no one from another House has been in the Badger's common room in over 1,000 years!