As dirt accumulates inside a filter, what happens to the amount of water that can pass through?

As dirt accumulates inside a filter, the amount of water that can pass through decreases. This is primarily because the accumulation of dirt and debris clogs the filter material, creating barriers that inhibit water flow. When the filter is clean, it allows for optimal water passage, but as the dirt builds up, the openings that allow water to flow through become smaller or blocked.

This reduced flow can lead to higher pressure differentials across the filter, making it necessary for operators to monitor filter performance regularly and conduct maintenance, such as backwashing or replacing the filter media. Ultimately, keeping filters clean is essential for maintaining proper water circulation and effective filtration in a pool system.