Replacement Filter Cartridges

Trying to find the right replacement filter cartridge for your swimming pool or spa can be difficult and frustrating. With over 650 filter cartridges for your pool or spa to choose from, we are sure to have exactly what you are looking for. Our goal is to make your search for the right replacement filter cartridge as easy as possible.

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Part Number: PWK40
MORE IMAGES
Top Cap
Bottom Cap
Outer Diameter 6 3/8"
Length 12"
Original Manufacturer Hot Spring Spas
Description: Filter Cartridge for Watkins Hot Spring Spas, 40 sq ft.
Pleatco:
Unicel# C-6600
Filbur# FC-3930
Price: $30.99
Part Number: PTL35P4-4
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Top Cap
Bottom Cap
Outer Diameter 4 3/4"
Length 15"
Original Manufacturer Hot Spring Spas
Description: Filter Cartridge for Hot Spring Spas, Watkins, 35 sq ft.
Pleatco:
Unicel# 4CH 35
Filbur# FC-0161
Price: $28.99
Filter Cartridge for Watkins Hot Spring Spas 45
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Top Cap
Bottom Cap
Outer Diameter 6 1/4"
Length 11 7/8"
Original Manufacturer Hot Spring Spas
Description: Filter Cartridge for Watkins Hot Spring Spas 45, 25 sq ft.
Pleatco:
Unicel#
Filbur#
Price: $21.99
Part Number: PWK30-4
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Top Cap
Bottom Cap
Outer Diameter 5 7/8"
Length 10 1/2"
Original Manufacturer Hot Spring Spas
Description: Filter Cartridge for Watkins Hot Spring Spas, 30 sq ft.
Pleatco:
Unicel#
Filbur# FC-3915
Price: $28.99
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Top Cap
Bottom Cap
Outer Diameter 5 7/8"
Length 10 1/2"
Original Manufacturer Hot Spring Spas
Description: Filter Cartridge for Hayward Star-Clear Plus C1750, Sta-Rite PXC-175, 30 sq ft.
Pleatco:
Unicel# C-6330
Filbur# FC-3915
Price: $13.99
Pleatco:
Antimicrobial
Unicel# C-6330
Filbur# FC-3915
Price: $16.99
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Top Cap
Bottom Cap
Outer Diameter 6"
Length 9"
Original Manufacturer Hot Spring Spas
Description: Filter Cartridge for Watkins Hot Spring Spas 33, 35 sq ft.
Pleatco:
Unicel# C-6433
Filbur# FC-3920
Price: $16.99
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Top Cap
Bottom Cap
Outer Diameter 8 1/2"
Length 10 1/2"
Original Manufacturer Hot Spring Spas
Description: Filter Cartridge for Watkins Hot Spring Spa (upgraded PWK45N), 65 sq ft.
Pleatco:
Unicel# C-8465
Filbur# FC-3960
Price: $34.99
Pleatco:
Antimicrobial
Unicel# C-8465
Filbur# FC-3960
Price: $47.99
MORE IMAGES
Top Cap
Bottom Cap
Outer Diameter 8 1/2"
Length 10 9/16"
Original Manufacturer Hot Spring Spas
Description: Filter Cartridge for Watkins Hot Spring Spas, 45 sq ft.
Pleatco:
Unicel#
Filbur#
Price: $38.99
Pleatco:
Antimicrobial
Unicel#
Filbur#
Price: $42.99
Pleatco:
Unicel#
Filbur#
Price: $47.99
Part Number: PWK50
MORE IMAGES
Top Cap
Bottom Cap
Outer Diameter 8 1/2"
Length 11 7/8"
Original Manufacturer Hot Spring Spas
Description: Filter Cartridge for Watkins Hot Spring Spas with Bulkhead Connection, 65 sq ft.
Pleatco:
Unicel#
Filbur#
Price: $33.99
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Top Cap 2 1/8"
Bottom Cap 2 1/8"
Outer Diameter 5"
Length 13 5/16"
Original Manufacturer Hot Spring Spas
Description: Filter Cartridge for Dynamic Series I RDC-25, I RDC-25S, Dynamic Series II & II RTL/RCF-25, Dynamic Series IV-DFM, DFML, Waterway 25 In-Line, and Custom Molded Products, 25 sq ft.
Pleatco:
Unicel# C-4326
Filbur# FC-2375
Price: $14.99
Pleatco:
Antimicrobial
Unicel# C-4326
Filbur# FC-2375
Price: $25.99
Part Number: PWK30V
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Top Cap 1 9/10"
Bottom Cap 1 9/10"
Outer Diameter 5"
Length 10 3/8"
Original Manufacturer Hot Spring Spas
Description: Filter Cartridge for Watkins Hot Spring Spas FH/IH 220V Models, 30 sq ft.
Pleatco:
Unicel# C-5431
Filbur# FC-3910
Price: $12.99
Part Number: PWK45-O-4
MORE IMAGES
Top Cap 1 9/10"
Bottom Cap 1 9/10"
Outer Diameter 8 1/2"
Length 12 5/16"
Original Manufacturer Hot Spring Spas
Description: Filter Cartridge for Watkins Hot Spring Spas Model P 1986, 45 sq ft.
Pleatco:
Unicel#
Filbur#
Price: $46.99
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