Bestway Inadequate Filtration / Bypass

Pump runs but pool water remains cloudy or dirty despite circulation.

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Possible Causes

Worn or undersized Bestway filter cartridge, Channeling in sand filter media, Incorrect valve position bypassing filter, Excessive pump flow rate for filter size

How to Fix / Troubleshooting

Safety first: Turn off and unplug the pump before changing filter settings or opening housings.

  • Check valve position: On Bestway sand filter systems, ensure the multiport valve is set to FILTER, not BYPASS or RECIRCULATE.
  • Replace cartridge: If using a cartridge filter, install a new Bestway cartridge of the correct size and type.
  • Backwash sand filter: Perform a thorough backwash and rinse cycle to restore sand bed performance.
  • Run time: Increase daily pump run time to improve turnover, especially after heavy use or storms.
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Repair Difficulty

Easy 2/5

Required Part

Bestway filter cartridge
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