How often should the filter cartridge be cleaned or replaced on a Grand Rapids portable spa?

Clean the filter cartridge every day, and replace the filter cartridge every two to three weeks depending on frequency of use and water conditions.

How to change a cartridge:

  1. Turn off the power to the control unit by unplugging the RCD.
  2. Shut off the water flow by screwing in the Jet caps to the suction and return jets on the inside of the liner.
  3. Open the air release valve by turning it counter clockwise.
  4. Unscrew the filter house lid by turning it counter clockwise.
  5. Take out the filter cartridge and replace it with a new one.
  6. Insert the new filter cartridge into the center of housing, making sure the seal ring is in the correct position. Close the lid by turning clockwise.
  7. Remove the jet caps from the intake and outtake of the spa liner to allow the water to flow into the control unit.
  8. Test the RCD by pressing the ‘Test’ button then the ‘Reset’ button. If the control unit does not turn on after this test then contact your dealer for service.