Top 10 Best hot tub filter in 2026

Last Updated - 6/6/2026

🏆Best Choice

POOLPURE

POOLPURE PLFPRB25-IN Hot Tub Filter Replace Unicel C-4326, Guardian 413-106, Filbur FC-2375, FC-2370, 3005845, 17-2327, 100586, 33521, 25392, 817-2500, 5X13 Drop in Spa Filter 1 Pack

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•SPECIFICATIONS: Length: 13 5/16”; Outside Diameter: 5”; Top Hole: 2 1/8” Open; Bottom Hole: 2 1/8” Open; Filtration Area: 25 Sq.ft; Filter Material: Trilobal Filtration Fabric.
•COMPATIBLE MODELS: PLFPRB25-IN Pool Filter is compatible with PRB25-IN, Unicel C-4326, Filbur FC-2375, FC-2370, SD-00196, 303909, M-4326, 8172500, R173429. ★NOTE: This is a compatible replacement. Original manufacturers' names and part numbers are for reference only. POOLPURE stands as an independent brand.
•NSF/ANSI 50 CERTIFIED: POOLPURE Pool and Spa filter has been rigorously tested and certified by IAPMO against NSF/ANSI 50, ensuring safe material usage. With a precision of 50 microns, our filter effectively removes hair, leaves, dust, sediment, sand, and other fine particles.
•POWERFUL FILTRATION CAPACITY: Our unique trilobal filtration fabric offers an enhanced surface area, optimizing back pressure throughout your filtration system. This ensures consistently clean, fresh, and clear water for your pool or spa.
•EASY MAINTENANCE: The uniform and high-performing trilobal fabric ensures effortless stain capture and release, simplifying the cleaning process. For optimal performance, it's recommended to clean the cartridges monthly, depending on usage.

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$21.99

$23.99

-8%

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Malaka

Malaka Spa Replacement Filter FD2007 Compatible with PWW50L 4CH-949 FC-0172, Hot Tub replacement Filter Cartridge, 2-Pack

9.7

ChoiceComparer.com Score

9.7

/ 10

Outstanding

Main highlights

•Length: 13 3/16" (34.7cm)
•Outside Diameter: 5" (12.5cm)
•Top: Handle
•Thread: 2" Female SAE Thread(4.85cm)
•Filtration Area: 50 sq.ft.

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$44.56

$46.90

-5%

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POOLPURE

POOLPURE 6CH-940 Spa Filter Replaces PWW50P3(1 1/2" Coarse Thread), 817-0050, Filbur FC-0359, 25252, 03FIL1400, Waterway Front Access Skimmer, Screw in SAE Thread Filter 2 Pack

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•➤SPECIFICATIONS:Length: 7 5/8"; Outside Diameter: 6"; Top: Circular Handle; Bottom: 1 1/2" SAE thread ; Filtration Area: 50 sq. ft; Filter Material: Trilobal Filtration Fabric.
•➤COMPATIBLE MODELS: PLF6CH-940 Spa Filter is compatible with PWW50P3(Not PWW50P4), Unicel 6CH-940, Filbur FC-0359, Waterway Plastics 817-0050, 25252, 378902, 03FIL1400, HTF0245RT. ★NOTE: This is a compatible replacement. Original manufacturers' names and part numbers are for reference only. POOLPURE stands as an independent brand.
•➤NSF/ANSI 50 CERTIFIED: POOLPURE Pool and Spa filter has been rigorously tested and certified by IAPMO against NSF/ANSI 50, ensuring safe material usage. With a precision of 50 microns, our filter effectively removes hair, leaves, dust, sediment, sand, and other fine particles.
•➤POWERFUL FILTRATION CAPACITY: Our unique trilobal filtration fabric offers an enhanced surface area, optimizing back pressure throughout your filtration system. This ensures consistently clean, fresh, and clear water for your pool or spa.
•➤EASY MAINTENANCE: The uniform and high-performing trilobal fabric ensures effortless stain capture and release, simplifying the cleaning process. For optimal performance, it's recommended to clean the cartridges monthly, depending on usage.

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$49.99

$63.99

-22%

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POOLPURE

POOLPURE PLFPRB50-IN Spa Filter Replaces Pleatco PRB50-IN, PRB50IN, Unicel C-4950, Filbur FC-2390, Jacuzzi J210/J220/J235/J245/J275, Guardian 413-212-02, 373045, 5X13 Drop in Hot Tub Filter, 1 Pack

9.4

ChoiceComparer.com Score

9.4

/ 10

Excellent

Main highlights

•【SPECIFICATIONS】Length: 13 5/16"; Outside Diameter: 5"; Top Opening: 2 1/8"; Bottom Opening: 2 1/8"; Material Area: 50 Sq.ft; Filter Material: Trilobal Filtration Fabric.
•【COMPATIBLE MODELS】PLFPRB50-IN filter compatible PRB50-IN, Unicel C-4950, Aladdin 15002, 03FIL1600,817-5000, 435-0037, R173434, 06-0012-12, SD-00201, PLE-051-0088, 6540-471, Jacuzzi J210/J220/J235/J245/J275 Hot Tub Filter.NOTE: This is a compatible spare part and the manufacturers' names and part numbers have been used for reference purposes only. POOLPURE is an independent brand.
•【NSF/ANSI 50 CERTIFIED】Poolpure Pool and Spa filter is tested and certified by IAPMO against NSF/ANSI 50 for safe material. The filter fabric with a precision of 50 microns can remove hair, leaves, dust, sediment, sand and other fine particles.
•【POWERFUL DIRT HOLDING CAPACITY】The unique trilobal filtration fabric has a greater effective surface area, which can increase back press- sure throughout your entire filtration system, and provide you with clean, fresh and clear water.
•【EASY TO CLEAN】Uniformity and high-performance trilobal fabric make it easier to capture and release stains, so it's easy for you to wash the filter after use. It is recommended that you clean the cartridges every month dependon usage to maximize your pool's performance.

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$25.99

$29.99

-13%

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POOLPURE

POOLPURE Type VI SPA and Hot Tub Filter Replaces Coleman SaluSpa 90352E 58323 90427E, Lay-Z-Spa Hot Tub Filter Cartridge, Inflatable Hot Tub Filters, Set of 4

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•【Compatibility Details】Dimensions: Length 3 1/8", Diameter 4 1/4", Openings:2" Top & Bottom. Designed to fit Type VI 90352E 58323 90427E. Compatible with Lay-Z-Spa, Intex and other inflatable hot tub filter. Note: This is a compatible replacement part.Original manufacturers' names and part numbers are referenced for compatibility. POOLPURE is an independent brand.
•【Superior Filtration】Our innovative "Dirt-Locking" technology ensures the fabric captures more contaminants than standard filters. Efficiently remove hair, leaves, dust, sediment, sand, and more. Revel in pristine water during your spa sessions.
•【Effortless Cleaning】 The Trilobal Fabric Structure of the filter facilitates easy release of impurities during cleaning, ensuring the filter feels renewed after each wash. For optimal performance, it's recommended to clean the cartridges once a month.
•【Powerful Filtration Capacity】 Our unique trilobal filtration fabric offers an enhanced surface area, optimizing back pressure throughout your filtration system. This ensures consistently clean, fresh, and clear water for your pool or spa.
•【Extended Lifespan】The unique Trilobal Filtration Fabric Structure allows for capturing a larger volume of contaminants. It's also designed for easy cleaning and maintenance. We're dedicated to offering top-quality products at an affordable price.
•⚠️ Not for Backwashing – This filter cartridge is not designed for backwashing. Backwashing may cause cracks or permanent damage.

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$17.99

$18.99

-5%

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POOLPURE

POOLPURE Spa Filter Replaces Watkins 303279, PFF42TC-P4, 5CH-37, 78460, FC-2402, Lifesmart, Freeflow, AquaTerra, Hydromaster, Grandmaster, Simplicity, Bermuda Hot Tub Filters 2PACK

9.1

ChoiceComparer.com Score

9.1

/ 10

Excellent

Main highlights

•【Certified Quality & Safety】 POOLPURE Pool and Spa filters proudly carry the NSF/ANSI 50 certification, having been rigorously tested and certified by IAPMO. Trust in POOLPURE to provide crystal-clear, purified water, enhancing your overall pool or spa experience. Dive into unmatched relaxation.
•【Specifications】Length: 9 3/8"; Outside Diameter: 5 1/4"; Top: Closed with String Handle; Bottom: 1 1/2" MPT Thread; Filtration Area: 42 Sq.ft; Filter Material: Trilobal Filtration Fabric.
•【Compatible Models】PLFFC-2402 Spa Filter is compatible with Watkins 303279, 78460, PFF42TC-P4, Filbur FC-2402, ACT-50SQFLTR, LSX1057, Pure N Clean PC-2402, SD-01322, Unicel 5CH-37. ★NOTE: This is a compatible replacement. Original manufacturers' names and part numbers are for reference only. POOLPURE stands as an independent brand.
•【Superior Filtration】 Our innovative "Dirt-Locking" technology ensures enhanced contaminant capture compared to standard fabrics. Efficiently filter out hair, leaves, dust, sediment, sand, and more for a pristine pool & Spa experience.
•【Durable & Cost-Effective】Featuring a unique Trilobal Filtration Fabric Structure, our filter excels in capturing a large volume of contaminants. It's also designed for easy cleaning and maintenance. With proper care, expect a service life of 1-2 years. We're dedicated to offering top-notch quality at an affordable price.
•⚠️ Not for Backwashing – This filter cartridge is not designed for backwashing. Backwashing may cause cracks or permanent damage.

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$43.99

$46.99

-6%

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Beckacher

6CH-940 Spa Filter Cartridge Replacement for Unicel, Pleatco PWW50P3, Filbur FC-0359, Aber 03FIL1400, Waterway 817-0050 Front Access Skimmer, Viking Pool Hot Tub Filter Screw SAE Thread Filter 2 Pack

8.9

ChoiceComparer.com Score

8.9

/ 10

Great

Main highlights

•【PERFECT COMPATIBILITY】PLF6CH-940 Spa Filter is ONLY compatible with the models listed below and does NOT fit any other models: Pleatco PWW50P3, Unicel 6CH-940, Filbur FC-0359, Waterway Plastics 817-0050, 25252, 378902, 03FIL1400, HTF0245RT, Aladdin 14510, Baleen AK-9019, Darlly 60401. Part NO.: PLE-051-9193, SD-00031, PLE-051-9194. Please confirm the model before placing an order! The manufacturer’s name &part number have been used for reference purposes only. Beckacher is an independent brand.
•【SPECIFICATIONS】Precise dimensional measurements make this product easy to install ：Length: 8"; Outside Diameter: 6"; Top: Circular Handle; Bottom: 1 1/2" SAE thread ; Filtration Area: 50 sq. ft; Filter Material: Trilobal Filtration Fabric.With its user-friendly design, this PLFPWW50P3 pool filter is easy to install and maintain, saving you time and effort on upkeep. Simply screw it in place and enjoy hassle-free spa maintenance.
•【EFFICIENT FILTRATION TECHNOLOGY - TRILOBAL MEDIA】Trilobal Media micro-pore design efficiently captures par ticles, ensuring your pool water is free from impurities and debris. Innovative "Dirt-Lock" technology improves filtration performance and effectively removes hair, leaves, dust, sediment, sand, etc.
•【WASHABLE & REUSABLE】Introducing our 6CH-940 hot tub filters replacements part crafted from easy-to-clean and durable materials, ensuring longevity and effortless maintenance. Designed for optimal performance, we recommend cleaning your spa filter every two weeks to maximize spa and hot tub efficiency while safeguarding your health. A gentle reminder: to prevent corrosion, always remove the filter before cleaning! Provide the safest swimming environment possible and promote better health!
•【RISK-FREE SHOPPING】6CH-940 hot tub filter replacement is made of premium quality material, supports 90 DAYS return and exchange.High quality,good price,high speed Amazon official logistics.We promise to ensure your absolute satisfaction with every purchase.If you have any quality problem about the 6CH-940 filter replacement during warranty period, please contact customer service in time. We will try our best to solve the problem. Customer satisfaction is our tireless pursuit！

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$32.99

$35.99

-8%

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POOLPURE

POOLPURE PAS50SV-F2M Spa Filter Replaces Unicel 6CH-502, Filbur FC-0311, Excel Filters XLS-604, Baleen AK-90161, Magnum AR50, Master Deluxe M60506 Hot Tub Filter, 2 Pack

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•【Certified Quality & Safety】 POOLPURE Pool and Spa filter proudly hold the NSF/ANSI 50 certification, tested and verified by IAPMO. Trust in POOLPURE to provide crystal-clear, purified water, enhancing your overall pool or spa experience. Dive into unmatched relaxation.
•【Specifications】 Length: 8"; Outer Dimension: 6 3/4"; Top: Handle; Bottom: 2" MPT. Filtration Area: 50 sq. ft.; Filter Material: Trilobal Filtration Fabric.
•【Compatibility Details】Designed to fit models: PAS50SV-F2M, Unicel 6CH-502, Filbur FC-0311, Excel Filters XLS-604. ★NOTE: This is a compatible part. Original manufacturers' names and part numbers are for reference only. POOLPURE stands as an independent brand.
•【Superior Filtration】Our innovative "Dirt-Locking" technology ensures that the fabric captures significantly more contaminants than standard filters. Efficiently remove hair, leaves, dust, sediment, sand, and more, ensuring a clean and refreshing spa and hot tub experience.
•【Effortless Cleaning】 The Trilobal Fabric Structure of the filter facilitates easy release of impurities during cleaning, ensuring the filter feels renewed after each wash. For optimal performance, it's recommended to clean the cartridges once a month.
•⚠️ Not for Backwashing – This filter cartridge is not designed for backwashing. Backwashing may cause cracks or permanent damage.

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$52.99

$56.99

-7%

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POOLPURE

POOLPURE PLF4CH-24 Spa Filter Replaces Pleatco PGS25P4, Unicel 4CH-24, Filbur FC-0131, 20254-238, SD-00004, PAS-1217, 12519, AK-9004, SD-01103, Gatsby 25, 25 sqft Filter Cartridge 1 Pack

8.6

ChoiceComparer.com Score

8.6

/ 10

Good

Main highlights

•【Certified Quality & Safety】 POOLPURE Pool and Spa filter proudly hold the NSF/ANSI 54 certification, tested and verified by IAPMO. Trust in POOLPURE to provide crystal-clear, purified water, enhancing your overall pool or spa experience. Dive into unmatched relaxation.
•【Specifications】Length: 9 3/4"; Outside Diameter: 4 5/8"; Top: Handle; Bottom: 1 1/2" MPT.Filtration Area: 25 sq. ft.; Filter Material: Trilobal Filtration Fabric.
•【Compatibility Details】Designed to fit models: Pleatco PGS25P4, Unicel 4CH-24, Baleen AK-9004, Aladdin 12519, Darlly 40260, Excel Filters XLS-434, Filbur FC-0131M, FC-0131, Magnum CH25, Pure N Clean PC-0131, Tier1 PAS-1217, SD-01103, SD-00004. ★NOTE: This is a compatible part. Original manufacturers' names and part numbers are for reference only. POOLPURE stands as an independent brand.
•【Superior Filtration】Our innovative "Dirt-Locking" technology ensures that the fabric captures significantly more contaminants than standard filters. Efficiently remove hair, leaves, dust, sediment, sand, and more, ensuring a clean and refreshing spa and hot tub experience.
•【Effortless Cleaning】 The Trilobal Fabric Structure of the filter facilitates easy release of impurities during cleaning, ensuring the filter feels renewed after each wash. For optimal performance, it's recommended to clean the cartridges once a month.
•⚠️ Not for Backwashing – This filter cartridge is not designed for backwashing. Backwashing may cause cracks or permanent damage.

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$26.99

$29.99

-10%

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Grefilt

Grefilt Hot Tub Filter Compatible with Watkins 303279, PFF42TC-P4, FC-2402, 5CH-37, Spa Filter for Lifesmart, Freeflow, Hydromaster, Grandmaster, 1 1/2" MPT Threaded, 42 sq.ft. 2-Pack

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•SPECIFICATIONS: Length: 9 3/8"; Outside Diameter: 5 1/4"; Top: Closed W/String; Bottom: 1 1/2" MPT Threaded; Filtration Area: 2*42 sq.ft.; Core: PP Core; Package Quantity: 2 Filters
•PERFECT FIT: Our hot tub filter is engineered to precisely replace for popular models including FC-2402 Watkins 303279, PFF42TC-P4, 78460, Lifesmart hot tub, Freeflow, AquaTerra, Hydromaster, Grandmaster, Simplicity, Bermuda, and other compatible models. NOTE: This is a compatible spare part and the manufacturers' names and part numbers have been used for reference purposes only. Grefilt is an independent brand
•NSF CERTIFIED: Grefilt spa filters with NSF certified safe filter materials ensures that water purity meets strict US standards. Only select quality filters for your family to guarantee the safety, health and happiness of your loved ones
•EASY TO MAINTAIN: Simple installation with no special tools required. The spa filters is easy to clean, and we recommend cleaning it every 2 weeks for optimal performance
•LONG-LASTING: Built with corrosion-resistant end caps and reinforced polyester fiber, this spa filters replacements for hot tub is designed to withstand the elements, providing long-lasting performance and reliable filtration

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$34.99

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