For the purpose of interpreting and applying the terms of this article, the following definitions will be observed:
Includes any structure or enclosure to which water is supplied, whether attached to realty or not.
A master plumber licensed under the provisions of Chapter 229, Plumbers.
Includes all places to which water is supplied, whether the same are occupied or vacant.
The Superintendent of the Water Department or any person duly designated to act on his behalf.