Unicel Cartridge C-4305 (Top)
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Unicel C-4305 50 sq. ft. Cal Spas Martec Sonfarrel Advantage Replacement Filter Cartridge

SKU #: C-4305

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Short Description

50 sq. ft. Cal Spas Martec Sonfarrel Advantage Manufacturing

Replacement Filter Cartridge Features:

  • 50 sq. ft.
  • 4-15/16" Outside Diameter
  • Length: 14-7/8"
  • Top End Cap: 2-1/8" Open
  • Bottom End Cap: 2-1/8" Open
  • Pleat Count: 193
  • Media: 3 oz.


Maintain sparkling clean and beautifully clear water with the Unicel Replacement Filter. Made with spunbonded, 100% polyester material, this Unicel Filter is durable and effective in capturing the smallest of debris. With replacement cartridges available in a variety of sizes and built to OEM specifications, you’re sure to get a reliable cartridge that fits your filter perfectly. Use this replacement filter to replace your worn or damaged cartridge or as a back up to maximize the time between filter changes. Easy to install, the Unicel Replacement Filter delivers OEM quality performance at a great price.