What is the pressure differential for cartridge filters and DE filters?

The pressure differential for cartridge filters and diatomaceous earth (DE) filters is typically set at 10 psi. This pressure differential is an important measurement that indicates how much dirt and debris the filter has accumulated and when it is time for maintenance, such as cleaning or replacing the filter media.

A pressure differential of 10 psi signifies that the filter is functioning well but is beginning to become clogged. Filters that exceed this pressure differential may indicate reduced efficiency and potentially harmful water quality if not attended to promptly. This standard helps pool operators maintain optimal filtration, ensuring that the water remains clean and safe for swimmers.

Understanding this pressure differential is crucial for effective maintenance routines, as it helps determine the exact timing for necessary filter cleaning interventions, directly impacting the pool's overall hygiene and safety.