Low Swimming Pool filter PSI

If you have low pool filter pressure, several things may also cause this. The most common reason is some debris is stuck in the pool impeller, restricting it and causing the pump to pull less water. Like a worn pump lid o-ring, a suction leak will also cause low filter pressure. A problem with the pump's diffuser can also cause this. However, a clogged impeller is the #1 cause and is easy to fix. Turn off the pump, remove the lid and basket, and then spin the impeller with a flathead screwdriver. This usually dislodges the debris, and you will then hear a gurgling sound as the debris is cleared from the impeller.

Some apparent causes are a clogged pool pump basket, a clogged skimmer basket, and low water in the pool. Too much suction at the side port towards a suction side cleaner can cause lower pool filter pressure. A clogged inlet line can also cause low filter pressure. The filter pressure PSI will also read low if a variable speed pump runs at or below 1600 RPM.

 A clogged suction side cleaner or a skimmer weir gate stuck in the closed position is also something to look at. Also, check the suction side cleaner houses for any tears or leaks. The canister on the line can also have a lousy lid o-ring, so check that as well.

 A broken filter gauge can also create a false PSI reading – either too high or too low- so ensure the pressure gauge is in good working order. They are easy to change and will only take a couple of minutes to do it.

 A flow gauge like the FlowVis would be a good investment, and if you want to get the best idea of your pool's actual flow, I suggest you install one. That way, no matter what the PSI on the gauge is, you can see from the flow meter how much water is flowing into the pool. This is the best way to monitor your pool's actual flow.

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