Best Spa Filter 2026

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Last Updated - 03.02.2026

Best Choice

01

POOLPURE

POOLPURE Spa Filter, Whirlpool Filter Replacement for Unicel 6CH-940, Pleatco PWW50P3, PWW50-P3, Filbur FC-0359, Waterway Plastics 817-0050, 25252, 378902, 03FIL1400 (Pack of 2)

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9.6

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Robust construction: the filters are constructed thanks to their robust construction and shatter-proof materials for maximum durability and function. The sturdy filter fabric with 45 m² surface, the ABS core and the sturdy lids allow a water flow with high pressure and are resistant to chlorine and other substances.
Premium pool and spare filter replacement: The Poolpure pool and spa filter replacement has been specially developed as a replacement filter for filter models from Pleatco Unicel Filbur and Waterway Plastics and comes as a value pack of 2 filters. Our filters are loss-free in water flow and thus offer the highest performance. Enjoy fresh, clean water in your pool and spa at any time that is free from harmful substances.
Powerful filtration: thanks to the innovative "dirt locking" technology, the filter is able to filter far more impurities from the water than conventional filters. Highly efficient hair, leaves, dust, sediment and sand are filtered out of the water. Nothing stands in the way of your bathing pleasure in clear, clean water with our filters.
Long service life thanks to innovative technology: thanks to the special structure of the trilobal filter fabric, not only the filtration is improved, but also cleaning is easier and the wear of the fabric is reduced. Thanks to the higher filter capacity, cleaning cycles are also extended. You have less effort and longer use for clear water in your spa and pool.
Compatibility and dimensions: our filters are compatible with Pleatco PWW50-P3, PWW50P3, Unicel 6CH-940, Filbur FC-0359, Waterway Plastics 817-0050, 25252, 378902, 03FIL1400. The top is equipped with a semi-circular carry handle. Dimensions: length: 19.4 cm, outer diameter: 15 cm, 1 1/2 inch (3.8 cm) SAE thread

40,99 €
02

JEFFEL

Spa Filter for Whirlpoal Pww50 Filter for Whirlpoal Filter Replacement for Unicel 6CH-940, Filbur FC-0359 for Waterway Plastics 817-0050 (Pack of 2)

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9.5

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

️【Long service life】: Unique trilobal filtration fabric structure makes it easy to catch and release stains, so it is easy for you to wash the filter after use. Compatible with most indoor/outdoor, inround, above ground swimming pools, hot tubs and spas. Enjoy clean leisure time in your pool. If you have any questions, please contact us. We will help you solve the problem within 24 hours.
Whirlpool filter high quality: JEFFEL replacement filter pww50 whirlpool filters and spa filter cartridges are made from certified safe materials. The entire filter contains a shatter-resistant handle, a large ABS inner core and a thick filter fabric to form a strong and durable body. The filter can resist high pressure and corrosion of high capacity chlorine. With proper maintenance, this filter can be used for 1-2 years.
Pww50 whirlpool filter: whirlpool filter diameter: 150 mm/5.9 inches; height: 241 mm/9.5 inches; thread: 46.5 mm/1.8 inches with 1-1/5.1 cm SAE thread. Filtration range: 45sq polyester fibres also help capture particles, improve efficiency without pressure drop. frequency of filter cleaning.
Powerful filtration performance: spa filter whirlpoal-innovative "dirt locking" technology ensures that the fabric contains much more impurities than conventional fabric. The filter can reduce hair, leaves, dust, sediment, sand highly efficiently. Enjoy leisure time in your spa and hot tub.
Compatible models: Pack of 2 spa hot tub filters, compatible with Filbur FC-0359 spa filter, PWW50P3, Unicel 6CH-940 and Waterway 817 0050, 03FIL1400, 25252, 378902 and PWW50-P3. Please note the screw thread difference between PWM W50-P3 and PWW50-P4

39,99 €
Value for Money

03

POOLPURE

POOLPURE Spa Filter, Whirlpool Filter Replacement for Unicel 6CH-940, Pleatco PWW50P3, PWW50-P3, Filbur FC-0359, Waterway Plastics 817-0050, 25252, 378902, 03FIL1400 (Pack of 2)

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9.2

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Robust construction: the filters are constructed thanks to their robust construction and shatter-proof materials for maximum durability and function. The sturdy filter fabric with 45 m² surface, the ABS core and the sturdy lids allow a water flow with high pressure and are resistant to chlorine and other substances.
Premium pool and spare filter replacement: The Poolpure pool and spa filter replacement has been specially developed as a replacement filter for filter models from Pleatco Unicel Filbur and Waterway Plastics and comes as a value pack of 2 filters. Our filters are loss-free in water flow and thus offer the highest performance. Enjoy fresh, clean water in your pool and spa at any time that is free from harmful substances.
Powerful filtration: thanks to the innovative "dirt locking" technology, the filter is able to filter far more impurities from the water than conventional filters. Highly efficient hair, leaves, dust, sediment and sand are filtered out of the water. Nothing stands in the way of your bathing pleasure in clear, clean water with our filters.
Long service life thanks to innovative technology: thanks to the special structure of the trilobal filter fabric, not only the filtration is improved, but also cleaning is easier and the wear of the fabric is reduced. Thanks to the higher filter capacity, cleaning cycles are also extended. You have less effort and longer use for clear water in your spa and pool.
Compatibility and dimensions: our filters are compatible with Pleatco PWW50-P3, PWW50P3, Unicel 6CH-940, Filbur FC-0359, Waterway Plastics 817-0050, 25252, 378902, 03FIL1400. The top is equipped with a semi-circular carry handle. Dimensions: length: 19.4 cm, outer diameter: 15 cm, 1 1/2 inch (3.8 cm) SAE thread

38,94 €
04

AQUALTRA

AQUALTRA Spa Filter Cartridges Compatible with PWW50P3 (39 mm Coarse Thread), 6CH-940, FC-0359, 817-0050, 194 x 150 mm Screw in SAE Thread Filter, Pack of 2

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9.1

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Washable and reusable: Aqualtra spa filter replacement parts are made of easy-to-clean, durable fabric that is easy to rinse and reuse. For performance optimization, we recommend cleaning the filter every 2 weeks. **IMPORTANT NOTE**: To avoid corrosion, please remove the filter before cleaning!
NSF certified materials: the 6CH-940 spa filter consists of a PET composite filter, a highly chlorine-resistant end cap and a polypropylene core. All materials are BPA free and NSF/ANSI certified to provide you with relaxed and safe leisure moments!
High filtration performance: The innovative "dirt locking" technology ensures that the fabric retains significantly more impurities than regular fabric. 45 square feet of filter area with 21-40% higher capacity than conventional point-bound fabrics. The Aqualtra spa filter effectively reduces hair, leaves, dust, sediment, sand, etc., ensuring a clean, comfortable bathing area.
Compatible models: outer gauge: 6 inch / 150 mm; length: 7 5/8 inch / 194 mm; top: round handle; bottom: 1 1/2 inch / 39 mm SAE thread. The AQUALTRA 6CH940 spa filter is compatible with PWW50P3 (not PWW50P4), FC-0359, SD-00031, SD-01049, 817-0050, 25252, 378902, 03FIL1400, HTF0245RT. *Note: All manufacturer names and part numbers remain the property of their respective owners and are used for compatibility information only. AQUALTRA is an independent brand. *
100% satisfaction guarantee: We value your shopping experience. If you have any problems with the AQUALTRA spa filter cartridge, please contact us - we will solve these within 24 hours. *Note: Please check before purchase whether the filter 6CH-940 fits your hot tub, spa or swimming pool. *

31,99 €
05

AQUALTRA

AQUALTRA Spa Filter Cartridges Compatible with PWW50P3 (39 mm Coarse Thread), 6CH-940, FC-0359, 817-0050, 194 x 150 mm Screw in SAE Thread Filter, Pack of 2

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9.0

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Show more
Main highlights

Washable and reusable: Aqualtra spa filter replacement parts are made of easy-to-clean, durable fabric that is easy to rinse and reuse. For performance optimization, we recommend cleaning the filter every 2 weeks. **IMPORTANT NOTE**: To avoid corrosion, please remove the filter before cleaning!
NSF certified materials: the 6CH-940 spa filter consists of a PET composite filter, a highly chlorine-resistant end cap and a polypropylene core. All materials are BPA free and NSF/ANSI certified to provide you with relaxed and safe leisure moments!
High filtration performance: The innovative "dirt locking" technology ensures that the fabric retains significantly more impurities than regular fabric. 45 square feet of filter area with 21-40% higher capacity than conventional point-bound fabrics. The Aqualtra spa filter effectively reduces hair, leaves, dust, sediment, sand, etc., ensuring a clean, comfortable bathing area.
Compatible models: outer gauge: 6 inch / 150 mm; length: 7 5/8 inch / 194 mm; top: round handle; bottom: 1 1/2 inch / 39 mm SAE thread. The AQUALTRA 6CH940 spa filter is compatible with PWW50P3 (not PWW50P4), FC-0359, SD-00031, SD-01049, 817-0050, 25252, 378902, 03FIL1400, HTF0245RT. *Note: All manufacturer names and part numbers remain the property of their respective owners and are used for compatibility information only. AQUALTRA is an independent brand. *
100% satisfaction guarantee: We value your shopping experience. If you have any problems with the AQUALTRA spa filter cartridge, please contact us - we will solve these within 24 hours. *Note: Please check before purchase whether the filter 6CH-940 fits your hot tub, spa or swimming pool. *

31,99 €
06

Sosayet

Sosayet Filter VI for Pool, Pack of 6 Filter Cartridges VI for Bestway Miami, Monaco Lay-Z-Spa, Vegas, Palm Springs, Flowclear Pool Filter Replaces Original Cartridge 58323

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8.9

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Warm tips: the pool filter is made of thicker fabric, which further improves the filter effect. The whirlpool filter can clog with impurities within 2-3 days depending on the water quality. But you don't need to worry, this is not a damaged cartridge, you just need to rinse the cartridge with water, no need to replace the cartridge.
High-quality material: our filter elements are made of high-quality mixed materials and are durable, which supports the filter against deformation at high water pressure. For clear and bottomless swimming pool water and the best performance of the swimming pool pump
Effective cleaning --- Our filter cartridges catch three times more impurities than conventional nets. This filter cartridges for pool efficiently removes hair, leaves, dust, deposits, sand etc. Enjoy a safe and healthy whirlpool spa
Easy installation and cleaning: the installation is simple and requires no tools. To clean, simply remove the filter from the pump and rinse it with water.
Compatibility: filter cartridges VI compatible with Bestway 58323, Lay-Z-Spa, Miami, Vegas, Monaco, Paris, Hawaii, Palm Springs, and many other pools and hot tubs. Please confirm the size before purchasing

22,99 €
07

DingGreat

DingGreat Spa Filter Cartridge, Filter Cartridge, Whirlpool Filter Replacement for Unicel 6CH-940, Pleatco PWW50P3, PWW50-P3, Filbur FC-0359, Waterway Plastics 817-0050, 25252, 03FIL1400, 378902, Pack

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8.8

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

STRONG AND DURABLE The whole filter is made of shatterproof handle, high flow ABS inner core and thick filter fabric to form a strong and durable body. The filter can withstand high pressure and corrosion of high capacity chlorine.
POWERFUL FILTRATION PERFORMANCE Thanks to the innovative "dirt locking" technology, the fabric contains much more impurities than ordinary fabric. The filter can highly efficiently reduce hair, leaves, dust, sediment and sand. Enjoy your leisure time in your spa and hot tub.
LONG LIFE The unique structure of the trilobal filtration fabric makes it easy to capture and remove stains, so you can easily wash the filter after use. The filter has been tested to be used longer than the other brands with regular washing. Pay less money to have more fun.
Hole size 150 mm/5.9 inches; length 243 mm/9.5 inches; coarse thread 46.5 mm/1.8 inches.
COMPATIBILITY Replacement filter for pool compatible with Pleatco PWW50-P3, PWW50P3, Unicel 6CH-940, Filbur FC-0359, Waterway Plastics 817-0050, 25252, 378902, 03FIL1400.

36,09 €
08

DingGreat

DingGreat Spa Filter Cartridge, Filter Cartridge, Whirlpool Filter Replacement for Unicel 6CH-940, Pleatco PWW50P3, PWW50-P3, Filbur FC-0359, Waterway Plastics 817-0050, 25252, 03FIL1400, 378902, Pack

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8.7

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Show more
Main highlights

STRONG AND DURABLE The whole filter is made of shatterproof handle, high flow ABS inner core and thick filter fabric to form a strong and durable body. The filter can withstand high pressure and corrosion of high capacity chlorine.
POWERFUL FILTRATION PERFORMANCE Thanks to the innovative "dirt locking" technology, the fabric contains much more impurities than ordinary fabric. The filter can highly efficiently reduce hair, leaves, dust, sediment and sand. Enjoy your leisure time in your spa and hot tub.
LONG LIFE The unique structure of the trilobal filtration fabric makes it easy to capture and remove stains, so you can easily wash the filter after use. The filter has been tested to be used longer than the other brands with regular washing. Pay less money to have more fun.
Hole size 150 mm/5.9 inches; length 243 mm/9.5 inches; coarse thread 46.5 mm/1.8 inches.
COMPATIBILITY Replacement filter for pool compatible with Pleatco PWW50-P3, PWW50P3, Unicel 6CH-940, Filbur FC-0359, Waterway Plastics 817-0050, 25252, 378902, 03FIL1400.

36,09 €
09

JEFFEL

Spa Filter for Whirlpoal Pww50 Filter for Whirlpoal Filter Replacement for Unicel 6CH-940, Filbur FC-0359 for Waterway Plastics 817-0050 (Pack of 2)

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8.6

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Show more
Main highlights

️【Long service life】: Unique trilobal filtration fabric structure makes it easy to catch and release stains, so it is easy for you to wash the filter after use. Compatible with most indoor/outdoor, inround, above ground swimming pools, hot tubs and spas. Enjoy clean leisure time in your pool. If you have any questions, please contact us. We will help you solve the problem within 24 hours.
Whirlpool filter high quality: JEFFEL replacement filter pww50 whirlpool filters and spa filter cartridges are made from certified safe materials. The entire filter contains a shatter-resistant handle, a large ABS inner core and a thick filter fabric to form a strong and durable body. The filter can resist high pressure and corrosion of high capacity chlorine. With proper maintenance, this filter can be used for 1-2 years.
Pww50 whirlpool filter: whirlpool filter diameter: 150 mm/5.9 inches; height: 241 mm/9.5 inches; thread: 46.5 mm/1.8 inches with 1-1/5.1 cm SAE thread. Filtration range: 45sq polyester fibres also help capture particles, improve efficiency without pressure drop. frequency of filter cleaning.
Powerful filtration performance: spa filter whirlpoal-innovative "dirt locking" technology ensures that the fabric contains much more impurities than conventional fabric. The filter can reduce hair, leaves, dust, sediment, sand highly efficiently. Enjoy leisure time in your spa and hot tub.
Compatible models: Pack of 2 spa hot tub filters, compatible with Filbur FC-0359 spa filter, PWW50P3, Unicel 6CH-940 and Waterway 817 0050, 03FIL1400, 25252, 378902 and PWW50-P3. Please note the screw thread difference between PWM W50-P3 and PWW50-P4

39,99 €
10

POOLPURE

POOLPURE Filter VI for Pool, Filter Cartridges VI for Lay-Z-Spa Miami, Monaco, Vegas, PoolFilter Replaces Original Cartridge BW58323, Pool Filter VI Cartridge (6 Pieces)

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8.3

Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Superior filtration: our filter cartridge VI innovative "dirt locking" technology ensures that the fabric catches more impurities than standard filters. Removes hair, leaves, dust, sediment, sand and more efficiently. Enjoy pristine water during your hot tub spa.
Powerful filtration capacity: Our unique trilobal filter fabric provides an enlarged surface area and optimises the back pressure in your filter system. This ensures consistently clean, fresh and clear water in your pool or spa.
Please note: !! : Before you proceed with the purchase, please check whether the model is compatible to ensure an optimal shopping experience.
Effortless Cleaning: The Trilobal fabric structure of the filter facilitates the release of impurities during cleaning and ensures that the filter feels like new after each wash. For optimal performance, it is recommended to clean the cartridges once a month.
Compatible with swimming pool pumps: suitable Lay-Z-Spa pumps: BW54123 - Miami, BW54112 Vegas, BW54129, Design Palm Springs & BW54113 - Monaco
Compatibility details: dimensions: height 7.9 cm, diameter 10.5 cm, openings: 5.15 cm top and bottom. Designed to fit Type VI 90352E. Compatible with filter lay z spa miami, Monaco Lay-Z-Spa, Vegas, Palm Springs and many other pools and hot tubs. Please note this is a compatible spare part, please refer to the original manufacturer's names and part numbers for compatibility. POOLPURE is an independent brand.

19,98 €