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Spa Filter Cartridges
Excel Filters spa and hot tub replacement filter cartridges are made in the USA to fit popular spa systems — including Waterway, Pentair Rainbow/Dynamic, Coleman and Maax spas, Sunrise Spas, Artesian Spas, and top-load housings. Match the part number on your old cartridge (or its Unicel, Pleatco, or Filbur cross-reference) for a direct-fit replacement at factory-direct pricing.
No cartridges match these filters.
XLS-406 • 1-Pack
In stockReplaces: Coleco F-120, Pleatco PC7-120, Unicel C-4607, Filbur FC-3710
XLS-607 • 1-Pack
In stockReplaces: Sundance 373043, Pleatco PTL47W-P4, Unicel 6CH-47, Filbur FC-0315
XLS-408 • 1-Pack
Low stockReplaces: Pentair R173434, Pleatco PRB50-IN, Unicel C-4950, Filbur FC-2390
XLS-604 • 1-Pack
Low stockReplaces: Artesian 06-0006-12, Pleatco PAS50SV-F2M, Unicel 6CH-502, Filbur FC-0311
XLS-511 • 1-Pack
In stockReplaces: Waterway 817-0014, Pleatco PLBS50, Unicel C-5345, Filbur FC-2970
XLS-435 • 2-Pack
In stockReplaces: Waterway 817-0010, Pleatco PWW10, Unicel C-4310, Filbur FC-3077
XLS-611 • 1-Pack
In stockReplaces: Pleatco PPG50P4, Unicel 6CH-49, Filbur FC-0314
XLS-608 • 1-Pack
Low stockReplaces: Pleatco PTL20W-SV-P4, Unicel 6CH-25, Filbur FC-0305
XLS-526 • 12-Pack
Low stockReplaces: Pleatco PMAX50P4, Unicel 5CH-35, Filbur FC-0300
XLS-512 • 15-Pack
Low stockReplaces: Waterway 817-0015, Pleatco PLBS75, Unicel C-5374, Filbur FC-2971
XLS-404 • 2-Pack
In stockReplaces: Waterway 817-3510, Pleatco PRB17.5SF-PAIR, Unicel C-4401, Filbur FC-2386
XLS-418 • 1-Pack
In stockReplaces: Pentair R173431, Pleatco PRB35-IN, Unicel C-4335, Filbur FC-2385
Spa and hot tub filter cartridges are smaller-format pleated cartridges sized for spa housings. Match the OEM part number on your current cartridge — or its cross-reference from Unicel, Pleatco, or Filbur — or measure diameter, length, and end caps. Excel Filters spa replacements are made in the USA at factory-direct pricing.
The easiest way to find the correct replacement is to identify your spa model, filter housing model, or existing cartridge part number. Many cartridges can be matched using the part number printed on the cartridge or a cross-reference number from brands like Unicel® (C-/6CH- series), Pleatco® (PRB/PLBS/PMAX series), or Filbur® (FC- series).
If you do not have a part number available, use the model information from your spa or filter housing, or measure your existing cartridge’s outside diameter, length, and end-cap style with our How to Measure Your Filter Cartridge Guide.
Once identified, match the information to the corresponding Excel Filters product listing to find your replacement.
Spa cartridges are generally smaller than pool cartridges and are designed for compact spa filtration systems. Warmer water and higher levels of body oils, lotions, and other contaminants can cause spa cartridges to require more frequent maintenance.
To find the correct replacement, match your existing cartridge part number to a cross-reference, or measure the diameter, length, and end-cap style to confirm the correct fit.
Excel Filters manufactures replacement cartridges for many popular spa and hot tub filtration systems, including Waterway®, Pentair® Rainbow/Dynamic®, Coleman®, Maax® Spas, Sunrise Spas®, Artesian Spas®, Sundance Spas®, Softub®, and other common top-load spa filter housings.
Our replacement cartridges are designed for a wide range of spa and hot tub applications, including top-load filters, in-line filter housings, and common 25–75 sq. ft. spa cartridge systems.
To ensure the correct fit, always verify your spa or hot tub model, filter housing model, existing cartridge part number, or cross-reference number (Unicel®, Pleatco®, or Filbur®). If the part number is unavailable, confirm the cartridge diameter, length, and end-cap style before ordering.
Rinse the pleats regularly with a garden hose, spraying at an angle to flush debris out from between the pleats. Avoid using high-pressure nozzles, which can damage the filter media.
For a deeper clean, soak the cartridge in a spa filter cleaning solution to remove body oils, lotions, sunscreen, and other buildup that rinsing alone cannot remove. After cleaning, rinse thoroughly and allow the cartridge to dry completely before reinstalling.
Keeping a second cartridge in rotation makes maintenance easier and allows your hot tub to remain filtered while one cartridge is being cleaned.
For detailed cleaning instructions and tips to maximize cartridge life, visit our Hot Tub & Spa Filter Care and Maintenance Guide.
Spa filter cartridges often collect buildup faster than pool cartridges because hot water, body oils, lotions, cosmetics, sunscreen, and other contaminants place a heavier load on the filter media.
Regular rinsing, proper water chemistry, and periodic deep cleaning with a spa filter cleaner can help extend cartridge life. Keeping a spare cartridge in rotation also makes maintenance easier and allows your spa to continue filtering while one cartridge is being cleaned and dried.
If water flow remains restricted or filter pressure stays high after a thorough cleaning, the cartridge may have reached the end of its useful life and should be replaced.
For detailed cleaning instructions and tips to extend cartridge life, visit our Hot Tub & Spa Filter Care and Maintenance Guide.
The lifespan of a spa filter cartridge depends on usage, water chemistry, cleaning habits, and overall spa conditions. Regular rinsing and periodic deep cleaning can help maximize cartridge life.
Replace the cartridge when cleaning no longer restores normal water flow or filtration performance, or when the media, pleats, bands, or end caps show signs of damage. For heavily used hot tubs, replacement may be needed more frequently than for lightly used spas.
Keeping a spare cartridge in rotation makes maintenance easier and allows your spa to continue operating while a cartridge is being cleaned and dried.
For recommended cleaning practices and tips to extend cartridge life, visit our Hot Tub & Spa Filter Care and Maintenance Guide.
