A tap that will not stop dripping is read as a small, persistent worry or a slow loss of energy. It is the kind of detail dream books see as asking to be fixed before it grows.
When this appeared in your dream, what were you feeling?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.