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Depends upon your starting pressure and pump type. Generally however you want to keep your max pressure at about 8-10 psi above your first time running the filter or your most recent sand change, if it goes above this run a backwash and a rinse cycle if it still persists at a higher pressure it's time to replace your sand.

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9y ago
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15y ago

Backwash the filter when the pressure increases 10 psi above the pressure when it was clean

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15y ago

Normal pressure is between 14-16 psi. when the filter is clean.

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Q: What is the proper psi for a sand filter pool pump?
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