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Northwind Hot Tub Filters
Northwind Hot Tub Filters
These Filters Meet or Exceed Specifications Set Forth By The Spa Manufacturer.

Square Feet
25
Outer Diameter
4 15/16"
Length
6 5/8"
Top
2 1/8" Inner DiameterTop example and MAY VARY
Bottom
2 1/8" Inner DiameterTop example and MAY VARY
Filter Media
4 oz
Replacement Cartridge Filters for these Unicel Products
C-4405
Replacement Cartridge Filters for these Pleatco Products
PRB25SF
Replacement Cartridge Filters for these Filbur Products
FC2387
FITS Rainbow DSF 50 [3005825]

Square Feet
50
Outer Diameter
4 15/16"
Length
13 5/16"
Top
2 1/8" Inner DiameterTop example and MAY VARY
Bottom
2 1/8" Inner DiameterTop example and MAY VARY
Filter Media
3 oz
Replacement Cartridge Filters for these Unicel Products
C-4950
Replacement Cartridge Filters for these Pleatco Products
PRB50-IN
Replacement Cartridge Filters for these Filbur Products
FC2390
FITS Rainbow Dynamic 50 [03FIL1600]

Square Feet
100
Outer Diameter
5 5/16"
Length
21 5/16"
Top
2 1/8" Inner DiameterTop example and MAY VARY
Bottom
2 1/8" Inner DiameterTop example and MAY VARY
Filter Media
Microban
Replacement Cartridge Filters for these Unicel Products
C-5396
Replacement Cartridge Filters for these Pleatco Products
PCST80
Replacement Cartridge Filters for these Filbur Products
FC2975
FITS Coast Spas 100, Waterway Plastics

Square Feet
100
Outer Diameter
4 15/16"
Length
23 5/8"
Top
2 1/8" Inner DiameterTop example and MAY VARY
Bottom
2 1/8" Inner DiameterTop example and MAY VARY
Filter Media
3 oz
Replacement Cartridge Filters for these Unicel Products
C-4995
Replacement Cartridge Filters for these Pleatco Products
PCAL100
Replacement Cartridge Filters for these Filbur Products
FC2940
FITS Waterway 100 [817-1000]

Square Feet
100
Outer Diameter
4 15/16"
Length
26 11/16"
Top
2 1/8" Inner DiameterTop example and MAY VARY
Bottom
2 1/8" Inner DiameterTop example and MAY VARY
Filter Media
3 oz
Replacement Cartridge Filters for these Unicel Products
C-4999
Replacement Cartridge Filters for these Pleatco Products
PRB100
Replacement Cartridge Filters for these Filbur Products
FC2397
FITS Rainbow Dynamic 100 [17-2633]

Square Feet
120
Outer Diameter
5 5/16"
Length
30 1/8"
Top
2 1/8" Inner DiameterTop example and MAY VARY
Bottom
2 1/8" Inner DiameterTop example and MAY VARY
Filter Media
Microban
Replacement Cartridge Filters for these Unicel Products
C-5351
Replacement Cartridge Filters for these Pleatco Products
PCST120
Replacement Cartridge Filters for these Filbur Products
FC2976
FITS Coast Spas (MICROBAN)