Which type of gravity filter consists of multiple media layers?

The multi-media filter is designed to improve the filtration process by utilizing multiple layers of different types of media, which can include sand, gravel, anthracite, or other materials. Each layer has a specific function and can target different particle sizes and types of contaminants, allowing for more efficient removal of impurities from the water. This arrangement increases the overall surface area for filtration and helps prevent clogging, enabling the filter to operate for longer periods before needing maintenance.

The inclusion of various media also enhances the filter's ability to manage a broader range of turbidity and organic materials, making it a preferred choice in many municipal and industrial water treatment systems. By utilizing multiple layers, the multi-media filter optimizes the filtration process, leading to better water quality.