A swimming pool, or simply a pool, is a container filled with water intended for swimming or water-based recreation. There are many standard sizes; the largest and deepest is the Olympic-size swimming pool. A pool can be built either above or in the ground, and from materials such as concrete, metal, plastic or fiberglass. The innovation of a composite construction of fibreglass, with an epoxy coating and porcelain ceramic tiles has led to the Pre-form, Composite-type with significant advantages over older methods; however, it also has increased sensitivity to metal staining.

For information about creating a Pool group, see the Help page on Pools

Not to be confused with:

• pool_(game) (billiards)
• pool_cue
• pool_table