What is gravel media used for in a filtration system?

Gravel media is primarily used in filtration systems to support the filter media. It plays a critical role in providing a stable base for finer materials, such as sand or anthracite, that are used to remove suspended particles from water. The gravel allows for adequate flow through the filter while preventing finer filtering materials from washing away or becoming compacted.

In addition to its structural function, gravel helps in maintaining the depth of the filter bed, which is essential for effective filtration. This layered approach ensures that water is treated efficiently as it flows through different media, each serving its purpose in the overall filtration process.

While other choices might seem relevant, they do not accurately reflect the primary purpose of gravel media in filtration systems. For instance, collecting water samples, enhancing water flavor, and filtering out dissolved solids do not pertain to the gravel's role, which is fundamentally about providing support and stability within the filtration setup.