The Unicel C-4321 is a 25 sq. ft. replacement filter cartridge built for Pentair Rainbow leaf trap pre-filters and select South Pacific Spas models. With 106 precision pleats of 3 oz. Reemay 2033 polyester media and a closed top cap with raised ring, this cartridge delivers reliable debris capture and consistent flow in compact filter housings.
Specifications
Filter Area
25 sq. ft.
Length
13 5/16″
Outer Diameter
4 15/16″
Top Inner Diameter
N/A
Bottom Inner Diameter
2 1/8″
Material
3 oz. Reemay 2033
Pleat Count
106
Top Cap: closed w/ raised ring
Bottom Cap: open
Fits into:
OEM Brand
Product Name
Part Number
Notes
Pentair – Rainbow Plastics
Leaf Trap cartridge
17-2653
17-2653 is the leaf trap assembly number. Replaces the cartridge inside this unit.
South Pacific Spas
–
–
Compatible with select models. Verify fit using dimensions above.
(This is not an exhaustive list.)
Pro Tip: Confirm fit by measuring your existing cartridge — 13 5/16″ length, 4 15/16″ outer diameter, and 2 1/8″ bottom inner diameter. The closed top cap with raised ring seats into the filter housing lid; the open bottom connects to the standpipe or manifold.
