Water Dragons are a specialised school of Feng Shui:

When one has achieved balance and harmony within the home or office environment, water formula's can then be applied to further enhance the lives of the residents.

These examples show you what a water dragon can look like. The Dragon section is the channel on the right with the round sump at the top.

This one also incorporates a pond which applies to other water formulae bringing extra wealth.

In Feng Shui water relates to money and when able to apply one of the many formula's one can achieve major wealth, long life and general prosperity in all walks of life. The water dragon is a water drain that passes the entrance to the building and it has a specific entry and exit point. It is considered one of the most powerful formula's. It can be applied to the home or work environment or both.