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You are here: Home > Hot Tub Filters by Size > 4" Diameter Hot Tub Filters
Choose a Sub-Category
Filter Range: 4" OD x 0-4" Length Filter Range: 4" OD x 4-6" Length Filter Range: 4" OD x 6-8" Length
Filter Range: 4" OD x 8-10" Length Filter Range: 4" OD x 10-12" Length Filter Range: 4" OD x 12-14" Length
Filter Range: 4" OD x 14-16" Length Filter Range: 4" OD x 16-18" Length Filter Range: 4" OD x 18-20" Length
Filter Range: 4" OD x 20-22" Length Filter Range: 4" OD x 22-24" Length Filter Range: 4" OD x 26-28" 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
5 sq. ft. SLM Replacement - Jacuzzi Leisure D-8,  Pelican, Atlantic, Coleco, Buddy-L, Empire, Icon Health  

Replacement for Hot Tub Filter numbers Pleatco # PC7-TC Unicel # C-4304 Filbur # FC-3711  

OD 4-1/4" Length 8" Top ID Closed Bottom ID 1-15/16"
5 sq. ft. General Foam Plastics  

Replacement for Hot Tub Filter numbers Pleatco # PGF5 Unicel # C-4306 Filbur # FC-3742  

OD 4-1/4" Length 8" Top ID 1/3/4" Bottom ID 1-3/4"
6 sq. ft. Muskin FP A2027, Sears, Haugh Products  

Replacement for Hot Tub Filter numbers Pleatco # PMS8 Unicel # C-4605 Filbur # FC-3810  

OD 4-5/16" Length 8" Top ID 2-3/16" Bottom ID 2-3/16"
Replacement Hot Tub Filter Replacement Hot Tub Filter Replacement Hot Tub Filter
5 sq. ft. Intex Type "A" or "C", Coleco DR-7 F-120, Wet Set 0203R,12R/22R, Krystal Klear, Best Way  

Replacement for Hot Tub Filter numbers Pleatco # PC7-120 Unicel # C-4607 Filbur # FC-3710  

OD 4-1/4" Length 8" Top ID 1-15/16" Bottom ID 1-15/16"
6 sq. ft. Muskin      

Replacement for Hot Tub Filter numbers Pleatco # N/A Unicel # C-4602 Filbur # FC-3811  

OD 4-5/16" Length 8" Top ID 2-3/16" Bottom ID 2-3/16"
8 sq. ft. Muskin A2300, Sears  

Replacement for Hot Tub Filter numbers Pleatco # PMS8TC Unicel # C-4600 Filbur # FC-3850  

OD 4-5/16" Length 8" Top ID Closed Bottom ID 2-3/16"
Replacement Hot Tub Filter Replacement Hot Tub Filter Replacement Hot Tub Filter
5 sq. ft. Coleco F-110 F-108 CR-8  

Replacement for Hot Tub Filter numbers Pleatco # PC8 Unicel # C-4608 Filbur # FC-3726  

OD 4-3/4" Length 8" Top ID 1-1/4" Bottom ID 2-7/16"
3 sq. ft. Twin Pack Intex Type "D" Sand-n-Sun  

Replacement for Hot Tub Filter numbers Pleatco # PBW4PAIR Unicel # C-4313 Filbur # FC-3750  

OD 4-1/4"
Length 3-3/4"
Top ID 2-1/16"
Bottom ID 2-1/16"
5 sq. ft. Coleco F-110 F-108  

Replacement for Hot Tub Filter numbers Pleatco # N/A Unicel # C-4609 Filbur # FC-3725  

OD 4-3/4" Length 8" Top ID 1-1/4" Bottom ID 2-7/16"
Replacement Hot Tub Filter Replacement Hot Tub Filter Replacement Hot Tub Filter
7 sq. ft. General Foam Plastics  

Replacement for Hot Tub Filter numbers Pleatco # PGF7 Unicel # C-4307 Filbur # FC-3744  

OD 4-3/4" Length 8" Top ID 1-3/4" Bottom ID 1-3/4"
12 sq. ft. Hayward (in-line) C120RE Replacement  

Replacement for Hot Tub Filter numbers Pleatco # PA12 Unicel # C-4312 Filbur # FC-1210  

OD 4-5/8"
Length 11-7/8"
Top ID 2-1/16"
Bottom ID 2-1/16"
9 sq. ft. Jacuzzi Leisure C-11  

Replacement for Hot Tub Filter numbers Pleatco # PHP11 Unicel # C-4603 Filbur # FC-3756  

OD 4-1/4" Length 10-7/8" Top ID 1-15/16" Bottom ID 1-15/16"