Unicel 4CH-30 Series 4000 Filter Cartridge for Spas, 30 Sq. Ft.

Brand: Unicel
Model: 4CH-30
Condition: New
Warranty: 1 Year
SKU: 726301
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Unicel 4CH-30 Universal Cartridges

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The Unicel 4CH-30 spa filter cartridge is made of Reemay spunbond polyester media. The material is resistant to chemicals and is incredibly easy to clean. This replacement cartridge is compatible with many of the leading spas, providing efficient and thorough filtration. Unicel is well-known for its high quality and high customer satisfaction.


    1. Measure the outside diameter of the cartridge (in inches, +/- 1/32"). 2. Measure the cartridge length (in inches, +/- 1/16") including end caps, but excluding any handles or other extensions. Unicel recommends measuring through the center (if possible) rather than along the outside edge. 3. Verify the cartridge outside edge end cap configuration is compatible with your current cartridge or your filter setup. If the top and/or bottom is "open," measure the inside diameter (in inches, +/- 1/32") of the top and/or bottom. 4. Record the OEM name and model of the filter the cartridge came out of (if possible). 5. Count the number of pleats (+/- 2) and note whether there is a center core or not.

Compatible OEM Filters:

  • Blue Pacific
  • Charisma Spas
  • Dimension One Spas
  • Dolphin Spas
  • Florida Whirlpool
  • Freedom Spas
  • Marathon Spas
  • Opu Spas
  • Saratoga Spas
  • Seascape Spas
  • Sundance Spas
  • Unicel
  • Spa Cartridge ONLY
  • Square Footage: 30
  • Top Cap: Molded Cone Handle
  • Bottom Cap: 1-1/2" Male Thread/MPT
  • Diameter: 4-5/8"
  • Length: 11-7/8"
  • Pleat Count: 158
  • Media: 4 oz
1 year warranty through the manufacturer.
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