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

Square Feet
17.5
Outer Diameter
4 15/16"
Length
4 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-4401
Replacement Cartridge Filters for these Pleatco Products
PRB17.5SF
Replacement Cartridge Filters for these Filbur Products
FC2386
FITS Rainbow DSF 35 [17-2606]

Square Feet
25
Outer Diameter
5 3/16"
Length
11 7/8"
Top
1 1/16" Inner DiameterTop example and MAY VARY
Bottom
1 5/8" Inner DiameterTop example and MAY VARY
Filter Media
4 oz
Replacement Cartridge Filters for these Unicel Products
C-5626
Replacement Cartridge Filters for these Pleatco Products
Replacement Cartridge Filters for these Filbur Products
FC3626
 FITS Pacific Marquis 25 (old design) OLD STYLE/ NEW STYLE HAS HOLE IN TOP