As used in this chapter, the following terms shall have the meanings indicated:
A portable or permanent swimming pool or tank, artificially constructed, which is installed, maintained and used primarily for bathing or wading, with an area of more than 120 square feet and a depth of more than 18 inches.
A portable or permanent pool, container, device or structure manufactured and sold as a wading pool or play pool and so placed upon the ground that, when filled with water, it is suitable for or is used as a swimming, wading or play pool for children, and the depth of which is 18 inches or less.