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You are here: Home > Hot Tub Filters by Size > 9" Diameter Hot Tub Filters
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Filter Range: 9" OD x 8-10" Length Filter Range: 9" OD x 10-12" Length Filter Range: 9" OD x 12-14" Length
Filter Range: 9" OD x 14-16" Length Filter Range: 9" OD x 18-20" Length Filter Range: 9" OD x 22-24" Length
Filter Range: 9" OD x 24-26" 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.
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Replacement Hot Tub Filter Replacement Hot Tub Filter Replacement Hot Tub Filter
50 sq. ft. Jacuzzi Bros. CFR 50 - CFT 100  

Replacement for Hot Tub Filter numbers Pleatco # PJ50-4 Unicel # C-9650 Filbur # FC-1460  

OD 9-15/16" Length 10" Top ID 5-13/16" Bottom ID 6-1/16" 		85 sq. ft. Hayward ASL Full-Flo C850  

Replacement for Hot Tub Filter numbers Pleatco # PA85-4 Unicel # C-9485 Filbur # FC-1298  

OD 9-1/4"
Length 14-3/16"
Top ID 3"
Bottom ID 3" 		100 sq. ft. Rec Warehouse, Waterway  

Replacement for Hot Tub Filter numbers Pleatco # PWW100-4 Unicel # C-9402 Filbur # FC-2965  

OD 9-15/16"
Length 19-5/16"
Top ID 5-3/16"
Bottom ID 6-1/16"
Replacement Hot Tub Filter Replacement Hot Tub Filter Replacement Hot Tub Filter
75 sq. ft. Aquatemp 3075  

Replacement for Hot Tub Filter numbers Pleatco # N/A Unicel # C-9601 Filbur # FC-6245  

OD 9"
Length 11-7/16"
Top ID 3-15/16" w/step
Bottom ID 3-15/16" w/step 		75 sq. ft. Rec Warehouse, Waterway  

Replacement for Hot Tub Filter numbers Pleatco # PWW75-4 Unicel # C-9401 Filbur # FC-2960  
OD 9-15/16"
Length 13-5/16"
Top ID 5-3/16"
Bottom ID 6-1/16" 		75 sq. ft. Jacuzzi Bros. CFR-75  

Replacement for Hot Tub Filter numbers Pleatco # PJ75-4 Unicel # C-9475 Filbur # FC-1480  

OD 9-15/16" Length 14-1/4" Top ID 5-15/16" Bottom ID 6-1/16"
Replacement Hot Tub Filter Replacement Hot Tub Filter Replacement Hot Tub Filter
100 sq. ft. Aquatemp 3100  

Replacement for Hot Tub Filter numbers Pleatco # N/A Unicel # C-9602 Filbur  # FC-6250  

OD 9"
Length 15"
Top ID 3-15/16" w/step
Bottom ID 3-15/16" w/step 		100 sq. ft. Jacuzzi Bros. CFR 100 - CFT 100  

Replacement for Hot Tub Filter numbers Pleatco # PJ100-4 Unicel # C-9699 Filbur # FC-1490  

OD 9-15/16" Length 19-7/8" Top ID 5-13/16" Bottom ID 6-1/16" 		120 sq. ft. Hayward ASL Full-flo C1200 / C1500, Muskin FE-129  

Replacement for Hot Tub Filter numbers Pleatco # PA125-4 Unicel # C-9499 Filbur # FC-1299  

OD 9-1/4"
Length 19-5/8"
Top ID 3"
Bottom ID 3"
Replacement Hot Tub Filter Replacement Hot Tub Filter Replacement Hot Tub Filter
150 sq. ft. Jacuzzi Bros. CFR-150  

Replacement for Hot Tub Filter numbers Pleatco # PJ150-4 Unicel # C-9478 Filbur # FC-1495  

OD 9-15/16" Length 24" Top ID 5-15/16" Bottom ID 6-1/16" 		150 sq. ft. Rec Warehouse, Waterway  

Replacement for Hot Tub Filter numbers Pleatco # PWW150-4 Unicel # C-9403 Filbur # FC-2969  

OD 9-15/16"
Length 25-5/16"
Top ID 5-3/16"
Bottom ID 6-1/16" 		150 sq. ft. Aquatemp 3150  

Replacement for Hot Tub Filter numbers Pleatco # N/A Unicel # C-9603 Filbur # FC-6255  

OD 9"
Length 22-5/8"
Top ID 3-15/16" w/step
Bottom ID 3-15/16" w/step
Replacement Hot Tub Filter Replacement Hot Tub Filter
200 sq. ft. Waterway Clearwater 200  

Replacement for Hot Tub Filter numbers Pleatco # PWW200-4 Unicel # C-9404 Filbur # FC-2968  

OD 9-15/16"
Length 25-5/16"
Top ID 5-3/16"
Bottom ID 6-1/16" 		200 sq. ft. Jacuzzi Bros. CFR-200  

Replacement for Hot Tub Filter numbers Pleatco # PJ200-4 Unicel # C-9420 Filbur # FC-1498  

OD 9-15/16" Length 24" Top ID 6-1/16" Bottom ID 5-13/16"