Filbur FC-0121 Spa Filter – 19 ft² Cartridge, 4CH-21

Renew your spa’s filtration with the 19 sq. ft. Filbur FC-0121 cartridge. Its 4⅝ in. diameter, 8 in. length, top handle, and 1½ in. MPT threaded male connection make it easy to compare this cartridge with your current filter.

Filbur FC-0121 filter specifications

• Filbur reference: FC-0121
• Filtration area: 19 sq. ft.
• Outside diameter: 4⅝ in. (approximately 117.5 mm)
• Length: 8 in. (203.2 mm)
• Top: handle
• Bottom: 1½ in. MPT threaded male connection
• Filter media: Reemay fabric
• Reinforced central core and end caps
• SKU: CARTOUCHEFC0121

A practical cartridge for maintaining your spa

The pleated media traps particles present in the filtration circuit. The handle makes it easier to remove the cartridge during maintenance. The central core and reinforced end caps support its structure during use and cleaning. A regularly maintained cartridge helps preserve suitable circulation for your spa system.

Cross-references and compatibility

The FC-0121 is a cross-reference for the Unicel 4CH-21 filter. The documentation provided also lists Pleatco PTL18P-4; the Filbur catalog presents this equivalent as PTL18-4. Before ordering, compare the outside diameter, cartridge length, and 1½ in. MPT threaded male connection with your current filter. An MPT connection and an SAE connection are not interchangeable.

Cleaning and replacement

Clean the cartridge according to the frequency recommended by your spa manufacturer and based on its use. Stop the system before removing the filter, following your spa manual. Rinse between the pleats and, if needed, use a cleaner designed for filter cartridges. Replace the cartridge if the media or end caps are damaged, or if cleaning no longer restores filtration.

Offer contents

One Filbur FC-0121 filter cartridge with a top handle and threaded male bottom connection. The filter housing, any adapters, and maintenance products are sold separately.

Need help choosing?

To verify the correct filter, send Piscine Hippocampe a photo of your cartridge and its bottom connection, its dimensions, and its reference. Mention FC-0121 or SKU CARTOUCHEFC0121.