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5 - 5.99 Inch Diameter Pool Filter Cartridges

We make it easy to find the right cartridge!

Choosing the right filter cartridge for your pool or spa filter can be rather confusing.  After all, we offer more than 500 different filter cartridges at POOLplaza.com. We have come up with several ways to find the right cartridge for your pool or spa filter. Once you have found the right cartridge, it's important to double check the dimensions and other specifications to make sure you have the right one.

If you have any questions, do not hesitate to e-mail us.  We answer every single email we receive from our customers.  We want to make sure that you get the right product in a timely manner.

Wondering about the quality of Unicel Replacement Cartridges?  We sell our customers Unicel replacement cartridges whenever possible because they are manufactured to the same high standards as the originals, but the cost is often far less.  

How do I choose the right cartridge?

Click on Unicel# below for more info or to purchase
Width Length

Top End Cap

Bottom End Cap Filter Brand/Model Unicel#
5" 8" 2-1/4" / open closed 8 sq. ft. Pelican Rec, H20 Recreation C-5301
5" 13-5/16" 2-3/8" / open 2-3/8" / open 15 sq. ft. Jacuzzi CFR-15 (in-line) C-5615
5" 13-5/16" 2-3/8" / open 2-3/8" / open 25 sq. ft. Jacuzzi CFR-25 (in-line) C-5625
5" 13-5/16" 2-3/8" / open 2-3/8" / open 37 sq. ft. Jacuzzi CFR-37 (in-line) C-5635
5-1/8" 10-1/4" 1-15/16" / open 1-15/16" / open 30 sq. ft. Hot Springs Spas/Watkins Mfg. (Model FH/IH (220 volt)) C-5431
5-3/16" 9" 1-5/8" / open 1-1/16" / open 16 sq. ft. Premier C-5616
5-3/16" 9" 1-5/8" / open 1-5/8" / open 25 sq. ft. Premier C-5426
5-3/16" 11-7/8" 1-5/8" / open closed 34 sq. ft. Marquis Spas (old style) C-5423
5-3/16" 11-7/8" 1-15/16" / open closed w/ string handle 22 sq. ft. Advanced Spa (original) C-5621
5-3/16" 11-7/8" 1-5/8" / open 1-1/16" / open 22 sq. ft. Premier (old) C-5622
5-3/16" 11-7/8" 1-5/8" / open 1-1/16" / open 25 sq. ft. Marquis Spas (old) C-5626
5-3/16" 11-7/8" 1-5/8" / open 1-5/8" / open 25 sq. ft. Premier C-5427
5-3/16" 12-1/2" 2” male thread/MPT bar handle 35 sq.ft. Marquis Spa (new style) 5CH-352
5-3/16" 12-1/2" 2” male thread/MPT bar handle 50 sq.ft. Marquis Spas (new style) 5CH-502
5-3/16" 14-1/8" 1-5/8" / open closed 50 sq. ft. Marquis Spas (old style) C-5346
5-3/16" 14-3/4" 1-5/8" / open 1-1/16" / open 27 sq. ft. Marlin Spa, Romanesque, Waterworks C-5627
5-3/16" 19-5/8" 1-5/8" / open closed 58 sq. ft. Pacific Marquis (new) C-5434
5-3/16" 19-5/8" 1-5/8" / open 1-1/16" / open 40 sq. ft. Pacific Marquis (old) C-5637
5-3/16" 19-5/8" 1-5/8" / open 1-1/16" / open 36 sq. ft. Marquis Spas C-5636
5-3/16" 23-1/4" 1-5/8" / open 1-5/8" / open 75 sq. ft. Premier, Maxi-Sweep C-5371
5-5/16" 10-1/8" 2-1/8" / open 2-1/8" / open 45 sq. ft. Rec Warehouse S2/G2 Spa, Rainbow, Waterway C-5345
5-5/16" 13-9/16" 2" / open 2" / open 23 sq. ft. Pac-Fab C-5623
5-5/16" 14-13/16" 2-1/8" / open 2-1/8" / open 65 sq. ft. Rec Warehouse S2/G2 Spa, Rainbow, Waterway C-5374
5-5/16" 17-13/16" 2-1/8" / open 2-1/8" / open 80 sq. ft. Rec Warehouse S2/G2 Spa, Rainbow, Waterway C-5397
5-5/16" 21-5/16" 2-1/8" / open 2-1/8" / open 100 sq.ft. Waterway, Coast Spas C-5396
5-5/16" 30-1/8" 2-1/8" / open 2-1/8" / open 135 sq.ft. Waterway, Coast Spas C-5351
5-1/2" 11-7/8" 2-7/8" / open 1-15/16" / open w/ 12 concentric holes 25 sq. ft. ozone cartridge (Dimension One Spas) C-5402
5-1/2" 17" 2-7/8" / open 1-15/16" / open w/ 12 concentric holes 40 sq. ft. ozone cartridge (Dimension One Spas) C-5404
5-11/16" 10-3/8" 2-1/8" / open closed w/ string loop 25 sq. ft. Jacuzzi Whirlpool Bath (front load) C-5601
5-11/16" 10-3/8" 2-1/8" / open closed w/ string loop 50 sq. ft. Jacuzzi Whirlpool Bath (front load) C-5300
5-3/4" 11-7/8" 2-1/8" / open 2-1/8" / open 25 sq. ft. Jacuzzi Whirlpool Bath C-5624
5-3/4" 11-7/8" 2-1/8" / open 2-1/8" / open 50 sq. ft. Teledyne Spa Pak C-5302
5-3/4" 12" 1-7/8" / open 1-7/8" / open 30 sq. ft. Intex 58621, Krystal Klear Models 520/530, Sand-n-Sun, Wet Set, East Set C-5330
5-7/8" 6" male slip fitting w/ molded o-ring semi-circular handle 25 sq. ft. Seasonmaster (Model 111 before 1994) C-5325
5-7/8" 6" male slip fitting w/ MPT semi-circular handle 25 sq. ft. Seasonmaster (Model 111 after 1994) C-5326
5-7/8" 12-3/4" male slip fitting w/ molded o-ring semi-circular handle 50 sq. ft. Seasonmaster (Model 121 before 1994) C-5350
5-7/8" 12-3/4" male slip fitting w/ MPT semi-circular handle 50 sq. ft. Seasonmaster (Model 121 after 1994) C-5349
5-7/8" 15-5/8" 1-3/8" / open molded cone handle 50 sq. ft. Nemco C-5405
5-7/8" 19-1/4" male slip fitting w/ molded o-ring closed 75 sq. ft. Seasonmaster (Model 131 before 1994) C-5375
5-7/8" 19-1/4" male slip fitting w/ MPT semi-circular handle 75 sq. ft. Seasonmaster (Model 131 after 1994) C-5376
5-7/8" 25-3/4" male slip fitting w/ molded o-ring semi-circular handle 100 sq. ft. Seasonmaster (Model 141 before 1994) C-5399
5-7/8" 25-3/4" male slip fitting w/ MPT semi-circular handle 100 sq. ft. Seasonmaster (Model 141 after 1994) C-5398

Click here to view photos of the end cap designs

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