ABOUT SSL CERTIFICATES
Pleatco Pure Spa Filters
Baleen Filters
RJ Filtration Pool and Spa Filters
Berlin Gardens Poly Furniture
Online Payments



You are here: Home > Hot Tub Filters by Size > 6" Diameter Hot Tub Filters
Choose a Sub-Category
Filter Range: 6" OD x 4-6" Length Filter Range: 6" OD x 8-10" Length Filter Range: 6" OD x 6-8" Length
Filter Range: 6" OD x 10-12" Length Filter Range: 6" OD x 12-14" Length Filter Range: 6" OD x 14-16" Length
Filter Range: 6" OD x 16-18" Length Filter Range: 6" OD x 18-20" Length Filter Range: 6" OD x 20-22" Length
Filter Range: 6" OD x 26-28" Length Filter Range: 6" OD x 28-30" Length Filter Range: 6" OD x 32-34" Length
Hot Tub Filters by Size
From the above sub-category list select the outer estimated diameter of your filter.
You can browse the filters listed or to drill down further by selecting the length grouping your filter falls within.
Compare your filters end-caps and select the correct replacement hot tub or spa filter.

Not sure how to measure your filter?
Watch the below Pleatco engineer's How to Measure a Hot Tub Filter Video guide.

Have a hot tub or spa filter part number?
Use the above search field if you know the Pleatco, Unicel, Filbur, Master Spa or Baleen number.

Find Hot Tub Filter by Spa Manufacture.
One other way to find your filter is to select the Hot Tub Filters category where we list filters by manufacturer.

All About Spas Replacement Hot Tub and Spa Filter Help.
You can always call us at 888.915.9919 for expert help to find the right filter so you can relax.


How to Measure a Filter Cartridge

Quick tutorial on How to Identify your filter cartridge by measuring or by product number.
These two methods can help you to easily find a replacement filter cartridge for your hot tub or spa regardless of manufacturer.
Sort By:
Page of 3
Replacement Hot Tub Filter Replacement Hot Tub Filter Replacement Hot Tub Filter
10 sq. ft. Muskin A2090 A3810, Sears    

Replacement for Hot Tub Filter numbers Pleatco # PMS10-4 Unicel # C-6610 Filbur # FC-3820  

OD 6-1/4" Length 8" Top ID 2-5/8" Bottom ID 2-5/8"
16 sq. ft. Muskin A3816, Sears  

Replacement for Hot Tub Filter numbers Pleatco # PMS16-4 Unicel # C-6616 Filbur # FC-3830  

OD 6-1/4" Length 8" Top ID 2-5/8" Bottom ID 2-5/8"
20 sq. ft. Muskin A3821, Sears  

Replacement for Hot Tub Filter numbers Pleatco # PMS20-4 Unicel # C-6620 Filbur # FC-3840  

OD 6-1/4" Length 8" Top ID 2-5/8" Bottom ID 2-5/8"
Master Spas Twilight Outer Filter X268512 Pleatco PMA25M Replacement Hot Tub Filter
Master Spas X268512 Twilight Outer Filter
Price: $47.50
Sale Price: $21.25
Save $26.25!

(8)
Master Spas Twilight Series Outer Filter with Microban by Master Spas.

This filter is used with the Twilight Series Eco Pur Inner Filter X268511.

Works on Master Spas Twilight Series spas "ONLY", 2009-Current.

Filter made with Microban Antibacterial Protection by Pleatco.

Pleatco Number PMA25-M

Height: 8 1/4"
Diameter: 6 1/2"
Opening: 4 1/16"
Pleatco Outer Filter with Microban.

This filter is used with the Twilight Series Eco Pur Inner Filter X268511.

Works on Master Spas Twilight Series spas "ONLY", 2009-Current.

Filter made with Microban Antibacterial Protection by Pleatco.

Height: 8 1/4"
Diameter: 6 1/2"
Opening: 4 1/16"
25 sq. ft. Artesian Spas, Thermo Spas, American Spas, Majestic Industries, J.E.M Spas  

Replacement for Hot Tub Filter numbers Pleatco # PTL25W-SV-P-4 Unicel # 6CH-26 Filbur # FC-0310  

OD 6" Length 7" Top ID Handle Bottom ID 1-1/2" MPT
Replacement Hot Tub Filter Replacement Hot Tub Filter Replacement Hot Tub Filter
Replacement Hot Tub Filter
Price: $26.21
Sale Price: $24.95
Save $1.26!
23 sq. ft. Coleco Dr-17, F-355, F-360, F-455, F-460  

Replacement for Hot Tub Filter numbers Pleatco # PC17-4 Unicel # C-6617 Filbur # FC-3741  

OD 6-1/2" Length 17" Top ID 3" Bottom ID 3"
33 sq. ft. Hot Springs, Watkins Mfg., Hot Spot, Tiger River  

Replacement for Hot Tub Filter numbers Pleatco # PWK35 Unicel # C-6433 Filbur # FC-3920  

OD 6" Length 9" Top ID 1-15/16" Bottom ID 1-15/16"
25 sq. ft. Jacuzzi CF-25, Cantar, Competition Pool, Atlantic Pools  

Replacement for Hot Tub Filter numbers Pleatco # PJ25-4 Unicel # C-6625 Filbur # FC-1426  

OD 6-7/8" Length 11-7/8" Top ID 3-1/2" Bottom ID 3-1/2"
Replacement Hot Tub Filter Replacement Hot Tub Filter Replacement Hot Tub Filter
Replacement Hot Tub Filter
Price: $26.00
Sale Price: $24.95
Save $1.05!

(1)
35 sq. ft. Diamondback Spas, Arizona Pacific  

Replacement for Hot Tub Filter numbers Pleatco # PTL35W-P-4 Unicel # 6CH-35 Filbur # FC-0320  

OD 6"
Length 9-7/8"
Top ID Handle
Bottom ID 1-1/2" MPT
25 sq. ft. Four Seasons, Aqua Spa  

Replacement for Hot Tub Filter numbers Pleatco # PTL25W-P-4 Unicel # C-6601 Filbur # FC-3083  

OD 6" Length 9-3/4" Top ID Handle Bottom ID 1-7/8"
30 sq. ft. Coleco DR-22, F-475, F-480, F-375, F-380  

Replacement for Hot Tub Filter numbers Pleatco # N/A Unicel # C-6622 Filbur # FC-3746

OD 6-1/2" Length 22" Top ID 3" Bottom ID 3"
Replacement Hot Tub Filter Replacement Hot Tub Filter AK-90131 Artesian Replacement Hot Tub Filter
30 sq. ft. Jacuzzi Whirlpool Bath Qanta  

Replacement for Hot Tub Filter numbers Pleatco # PJW30-4 Unicel # C-6300 Filbur # FC-1340  

OD 6-7/8" Length 14-7/8" Top ID 3-1/2" Bottom ID 3-1/2"
25 sq. ft. Softub  

Replacement for Hot Tub Filter numbers Pleatco # PTL20W-SV-P-4 Unicel # 6CH-25 Filbur # FC-0305  

OD 6"
Length 5-1/2"
Top ID Handle
Bottom ID 1-1/2" MPT
35 sq. ft. Skim Filter, Artesian Spas  

Replacement for Hot Tub Filter numbers Pleatco # N/A Unicel # 6CH-352 Filbur # FC-0312  

OD 6" Length 8" Top ID Handle Bottom ID 2" MPT
AK-5005 Replacement Hot Tub Filter Replacement Hot Tub Filter Replacement Hot Tub Filter
30 sq. ft. Hot Springs, Watkins Mfg., Hot Spot, Tiger River  

AK-5005 Replacement for Hot Tub Filter numbers Pleatco # PWK30 Unicel # C-6430 Watkins 31489 Filbur # FC-3915  

OD 6"
Length 10-1/2"
Top ID 1-15/16"
Bottom ID 1-15/16"
45 sq. ft. Master Spas, Freedom Spas, Down East, ft. Wayne  

Replacement for Hot Tub Filter numbers Pleatco # PTL45W-P-4 Unicel # 6CH-45 Filbur # FC-0330  

OD 6" Length 12-3/8" Top ID Handle Bottom ID 1-1/2" MPT
35 sq. ft. Four Seasons  

Replacement for Hot Tub Filter numbers Pleatco # PTL50W-SH Unicel # C-6603 Filbur # FC-3088  

OD 6" Length 14-3/4" Top ID Handle Bottom ID 1-7/8" w/slots
Replacement Hot Tub Filter Replacement Hot Tub Filter AK-90192 Replacement Hot Tub Filter
45 sq. ft. Hot Springs Spas, Hot Spot, Tiger River, Watkins  

Replacement for Hot Tub Filter numbers Pleatco # PWK40 Unicel # C-6600 Filbur # FC-3930  

OD 6-3/8" Length 11-7/8" Top ID 3" Bottom ID 3"
50 sq. ft. LA Spas, Pacific Spas, Gatsby, Advanced Spa Design, Crystal Water Echo  

Replacement for Hot Tub Filter numbers Pleatco # PTL47W-P Unicel # 6CH-47 Filbur # FC-0315  

OD 6"
Length 9-1/8"
Top ID Handle
Bottom ID 1-1/2" MPT
45 sq. ft. Waterway stacked, Custom Molded, Superior, Haven (stack with AK-90192)

Replacement for Hot Tub Filter numbers Pleatco PWW100ST-P3 Unicel # 6CH-941 Filbur FC-0360

OD 6"
Length 8-1/4"
Top ID Handle
Bottom ID 1-1/2" SAE