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Spa Filter Baleen: AK-4004, OEM: N/A, Pleatco: PLW25P-4, Unicel: C-5326 , Filbur: FC-3107, Diameter: 5-7/8", Length: 6"

  • Spa Filter Baleen:  AK-4004 , Unicel:  C-5326 , Filbur: FC-3107
  • Top View
  • Bottom View
$29.99 $26.99
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Product Description

Our hot tub spa filters meets or exceeds manufacturer specifications.


Filter Specifications:

  • Square Footage: 25 sq. ft.
  • Media/Thickness: 3
  • Diameter: 5-7/8"
  • Length: 6"
  • Top: Handle
  • Bottom: Male Slip Fitting

Equivalent to:

  • Pleatco: N/A
  • Unicel: C-5326
  • Filbur: FC-3107
  • OEM:

This Filter Fits The Following Brands:

Seasonmaster (Model 111 after 1994)

Filter Glossary


As you can see in this graphic, when looking at a filter's threads from the side the difference is very obvious. Standard, sometimes called "MPT" or "Male Pipe" threads are smaller and have a higher number of threads than the S.A.E. style. The S.A.E. threads are large and are square in nature almost resembling a child's toy.

  • MPT: Male Pipe Thread
  • FPT: Female Pipe Thread
How to measure a hot tub filter references:

Spa Care Center or Pool Care Center

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