What is the purpose of a pool's main drain?

The primary function of a pool's main drain is to remove water from the bottom of the pool. This is essential for several reasons, such as helping to maintain water clarity and sanitation. When water is removed through the main drain, it allows for the circulation of water in the pool to occur more effectively, facilitating the movement of water toward the skimmers and ensuring that the filtration system runs efficiently.

Additionally, removing water from the bottom helps to eliminate debris that sinks to that level, which contributes to maintaining a clean environment for swimmers. In terms of pool maintenance, the main drain also assists in balancing water levels, particularly following heavy rainfall or during routine cleaning processes.

While distributing chemicals, monitoring temperature, and preventing overflow are important aspects of pool management, they are not the direct functions of the main drain. Each of those tasks is typically handled by different systems or components within the overall pool infrastructure.