The Filbur FC-0359 replacement filter cartridge is a precise, spa- and pool-ready solution designed for Waterway 45 sq ft filtration systems. It delivers dependable, direct-fit filtration for home spas and light commercial pools, with a geometry that mirrors original components for a secure, leak-free install.
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Exact fit for Waterway 45 sq ft housings: optimized 6" diameter and 8 1/4" length to ensure compatible, seal-tight installation.
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6" diameter × 8.25" length: compact profile that preserves filtration surface area within tight equipment spaces.
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Semi-circle handle with closed top: designed for easy removal and handling, even when the surface is wet.
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Bottom connection: 1 1/2" SAE threads provide a secure, leak-resistant seal with compatible filter housings.
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Direct replacement for multiple part numbers: replaces 6CH-940, FC-0359, and P4450; PF6-940 alias simplifies upgrades without guesswork.
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Spa and pool ready: built for residential and light commercial filtration setups, helping keep water clear and inviting.
Choosing the FC-0359 means preserving the original system’s flow characteristics and sealing interfaces, reducing the risk of leaks and unnecessary pump strain. The cartridge maintains consistent filtration performance across cycles, supporting crystal-clear water with straightforward maintenance. For installation, power down the pump, remove the old cartridge, rinse the housing interior, insert the FC-0359 until it sits firmly, reassemble the housing, and run the system to check for leaks. Regular surface rinsing and replacement aligned with water quality and usage keep spa and pool water fresh and inviting.
