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What causes pressure with a pool pump to drop?

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2007-03-28 07:39:55
2007-03-28 07:39:55

A clogged filter? The pressure AT THE GAUGE will drop after the pool is backwashed and also during vacumning. As the filter becomes clogged the pressure AT THE GAUGE will increase. The opposite effect occurs at the inlet eyeball.

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You may have a suction leak somewhere between the pool and the pump. Or, you have let the water level drop below the middle of the skimmer(s). k



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So long as there is water coming through the pump when it is running it doesnt matter what the water level in the pool is.


The pressure increasing indicates that something is blocking the filter.



Not necessarily, it depends on the condition of the original pump. It may have a worn or warped impeller. I would look into making sure the original pump is in good shape.


You will need to backwash the pump, and then rinse out the filter.


Strainer basket id full or blocked


When the pressure on the filter pump is above 20 psi.


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If you remove the cartridge from your filter housing, the presssure reading will drop. If you are having low pressure issues this is an easy way to determine if the problem is on the pressure side of the suction side of the pump. Depending on what type of pool you have, and what in on the equipment pad. If you pump usually runs at 15 -18 psi then with out the filter I would guess it would be about 8 psi. Hope that helps.


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



Usually the pressure gauge on your pool equipment indicates how much pressure there is before the filter. as the pressure goes up it indicates that the filter is getting blocked and needs a backwash or cleaning. while the pressure is low the filter does not need cleaning.


When vacuuming a pool manually a loss of pressure can be caused by something getting stuck in the hose. A leaf or a large bug can get stuck in the hose and cause it to lose pressure.



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