In the world of dreams the rules of reality do not necessarily apply. Each dream is unique and it's a direct link to the soul and spirit. Psychology provides its own theories on what dreams mean, but so did tradition and the study of dreams for thousands of years before any relevant science had developed.
Dream Meanings - Tap
If you drink water from a tap then you will have some news very soon. If you see lots of water running from a tap in your sleep then you will have success at work and in your emotional life. If it is dripping a little then you will encounter some obstacles.