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How to Clean a Cartridge Filter

Many hot tubs use cartridge filters today. Cleaning your filters periodically will help your hot tub run most efficiently. Cartridge filters are relatively easy to clean and care for. You will need a filter-cleaning solution. You should soak the filter overnight, though 4-8 hours may be enough (consult the directions on the cleaner you purchase). It's a good idea to have to filters on hand so you can swap them out.

Steps for cleaning a cartridge filter:

  • Turn off the power to the hot tub and remove debris from the strainer basket.
  • Follow the instructions that came with your hot tub to open the housing and remove the cartridge (replace the dirty filter with a clean one if you have a spare).
  • Use a high pressure nozzle to rinse your cartridge. Angle the water in a stream to remove the dirt from between the flanges.
  • Soak the cartridge in a filter cleaning solution (usually about 1 c. of cleaner for bucket of water -- check the directions on the back of the cleaner).
  • When you remove the cartridge, rinse it with fresh water.
  • Store the cartridge and allow it to dry.


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