What pool filter pressure means

Overview

Filter pressure reflects resistance in a particular hydraulic system. The useful reference is the pressure recorded after the filter is correctly cleaned, air is removed and the pump is running at a stated speed. Another pool's number is not your normal.

Check first

• Read the gauge at the same programmed pump speed used for the clean baseline.
• Check return flow, pump-lid water, pool level and accessible baskets.
• Look for air in the filter or returns and use only the manufacturer's air-release procedure.
• Confirm valve positions and whether a cleaner, spa, solar or water feature circuit has changed.
• Record the reading before and after correct filter cleaning.

Stop and call a technician

• The filter vessel, clamp, lid or plumbing leaks or deforms.
• The gauge rises suddenly or pressure does not release after shutdown.
• Return flow is very weak and the pump shows air or cavitation.
• The correct cleaning method is unknown or the filter label is unreadable.
• Pressure remains abnormal after safe basket and filter maintenance.

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