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  2. Caldera Spas

Caldera Spa Filters

Caldera Spa filters maintain pristine water quality in your hot tub through premium cartridge-style filtration. While the OEM brand manufactures a wide range of hot tubs across its Utopia, Paradise, and Vacanza lines with different price points, all spas and hot tubs require regular maintenance and filter changes to ensure they run in peak condition and the water is always clear and welcoming. At AllFilters, we offer SpiroPure replacement cartridges compatible with Caldera specifications. Our filters deliver the same performance as OEM products at 30-50% savings. Browse our selection of spa tub filters for Caldera hot tubs here.

Cross Reference Chart

SpiroPure

Unicel

Filbur

Pleatco

Caldera Spas
SpiroPure SP-PS-3960

SP-PS-3960

8-1/2" x 10-1/2"

C-8465

FC-3960

PWK65

76136
SpiroPure SP-PS-2385

SP-PS-2385

4-15/16" x 9-1/4"

C-4335

FC-2385

PRB35-IN

74148
SpiroPure SP-PS-3084

SP-PS-3084

7" x 10-3/4"

C-7451

FC-3084

PCD50

33016 / 033016
SpiroPure SP-PS-2390

SP-PS-2390

4-15/16" x 13-5/16"

C-4950

FC-2390

PRB50

302005 / 73533 / 76076
SpiroPure SP-PS-3963

SP-PS-3963

7" x 10-3/4"

C-7350

FC-3963

PCD50N

73532 / 1019401
SpiroPure SP-PS-3085

SP-PS-3085

7" x 14-3/4"

C-7479

FC-3085

PCD75

33017
SpiroPure SP-PS-3964

SP-PS-3964

7" x 14-3/4"

C-7375

FC-3964

PCD75N

75 (new style) 1019301

Features of Caldera Spa Filters

Spiropure's line of Caldera spa-compatible filters use high-efficiency point-bonded pleated media that maximizes filtration surface area while maintaining optimal water flow through your spa's circulation system. Quality filtration reduces strain on pumps and heaters, extending equipment life. Caldera manufactures filters in various sizes to fit the water volume and flow needs of their different series and models, so SpiroPure offers several models with compatible sizing and filtration specifications to ensure water flows clear and easy without additional chemical interventions.

Caldera Spa Filter Replacement: Easy Steps for Maintenance

Modern spa filters housing is designed for easy access to ensure spa owners can stay on top of this critical, but basic maintenance task. Turn off your spa's pump first. Open the filter access compartment. Caldera designs will feature either a top-load or side-access. Inspect and clean extra debris from the compartment. Unscrew or remove the old filter and replace with a new one. Close the housing compartment and restore the pump power to ensure normal water flow. Replace filters every 12-18 months for optimal performance.

FAQs on Caldera Spa Filter

Can I use a Caldera hot tub filter replacement for my Jacuzzi?

Caldera and Jacuzzi are separate brands manufactured by different companies. While some filter dimensions might coincidentally match, you cannot assume Caldera filters fit Jacuzzi spas. Always match filters by model numbers on All Filters' cross-reference charts or by exact specifications.
Replace your Caldera filter every 12–18 months, or sooner if you notice signs such as reduced water flow despite cleaning, visible damage to pleats, persistent cloudiness despite proper FreshWater system maintenance, pressure readings that don't normalize after cleaning, or discolored media that won't clean up.
Purchase Caldera spa filter compatible replacements at Allfilters.com. We offer SpiroPure cartridges compatible with a range of Caldera series and models. Our product listings include detailed specifications and Caldera part number cross-references to ensure correct fit. Orders ship quickly and filters cost less than OEM.
Rinse your Caldera filter every 2–4 weeks with a garden hose, spraying between pleats to remove trapped debris. Be aware that pressure washers are likely to damage the media. A deep clean performed every few months or so can help dissolve oils, lotions, and minerals that affect the system's performance, but all polyester cartridge filters eventually wear down and should be replaced. Many customers prefer a standard replacement schedule to additional cleaning.
Caldera filters may be designed for Caldera hot tubs though other companies such as SpiroPure manufacturer replacements with the same dimensions, thread types, and end cap configurations. Always verify compatibility by matching precise measurements or through model comparison charts by All Filters.

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