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The Filbur FC-3575 is the replacement filter for the Unicel C-8315 R.
Guaranteed to fit or your money back!
The Unicel C-8315 Comp. Replacement Pool Filter is a pool filter cartridge replacement constructed with 150 sq. ft. of pleated Reemay filter media for the reduction of contaminants in swimming pool and spa water. This compatible Unicel spa filter, also known as the Filbur FC-3575, measures 8 1/2" x 22 3/4" with a 3 1/8" Open top style and 2 1/8" Open bottom style.