FC-0359 SPA Filter Replacement for Unicel 6CH-940 - NSF Certified 2

In this review the FC-0359 SPA Filter Replacement is assessed for pool and spa owners who need a reliable, compatible replacement cartridge. The bottom line: this two-pack is best for anyone with models that accept a 1 1/2' SAE coarse-thread screw-in filter and who values certified safety and longer-lasting media. It stands out because it is NSF/ANSI 50 certified and uses trilobal filtration fabric, which together promise safer, clearer water and fewer cleanings compared with common point-bond filters.

Key Features

• NSF/ANSI 50 certified: Certified materials reduce chemical and biological risk so families get cleaner, safer water.
• Trilobal filtration fabric: The trilobal fiber shape increases particle capture and filtration capacity without a major pressure drop, meaning longer runs between cleanings.
• 50 sq. ft. filtration area: A larger filtration surface helps maintain flow while handling more debris before maintenance is required.
• Reinforced structure: Thicker fabric and stronger end caps resist chlorine and physical stress so cartridges tolerate cleaning and repeated use.
• Direct replacement fit: Designed to be compatible with Unicel 6CH-940 and PWW50P3 style housings, offering a straightforward swap for owners of those models.
• Convenient two-pack: Two cartridges in one purchase give immediate spare capacity or a matched replacement set for dual-filter systems.

Who It's For

This cartridge set is ideal for homeowners and small commercial operators using filter housings that accept a 1 1/2' SAE coarse-thread screw-in element and who want an NSF/ANSI 50 certified option. It suits users who prioritize longer intervals between cleanings and expect a durable replacement that tolerates regular chlorine exposure.

Those who should look elsewhere include owners of the PWW50P4 variant or non-screw-in filter designs, and anyone requiring a custom or exact original equipment part number from the original manufacturer rather than a compatible independent-brand cartridge.

Pros & Cons

Pros

• Certified safety materials give confidence in water quality and reduce health concerns.
• Higher filtration capacity from the trilobal fabric improves debris capture and reduces cleaning frequency.
• Sturdy construction and reinforced center support mean the cartridge handles cleaning and repeated use well.
• Easy installation and good fit reported by customers, making replacement quick.

Cons

• Compatibility excludes PWW50P4 and is limited to specific models, so buyers must verify fit before purchase.

Specifications

Length	7 5/8 in
Outside Diameter	6 in
Top	Circular handle
Bottom Thread	1 1/2 in SAE coarse thread
Filtration Area	50 sq. ft
Filter Material	Trilobal filtration fabric

Our Verdict

The FC-0359 two-pack is a practical, cost-effective replacement for compatible screw-in spa and pool systems, especially for those who value certified materials and higher-capacity trilobal media. It offers durable construction and easy installation, making it a strong value for owners of matching models who want cleaner water with less maintenance.

Frequently Asked Questions

Will this fit my Unicel 6CH-940 housing?
Yes, this cartridge is designed to be compatible with Unicel 6CH-940 style housings and similar PWW50P3 fittings; verify you do not require the PWW50P4 variant.

Can these filters be cleaned and reused?
Customers report the reinforced fabric and end caps tolerate cleaning, so the cartridges can be rinsed and reused until they show wear.

Are these original manufacturer parts?
No, these are compatible replacement cartridges from an independent brand; original manufacturer part numbers are listed for reference only.