Unicel C-3310AM Replacement Filter Cartridge | 8 sq. ft. | Master Spas Eco-Pur Inner

The Unicel 3000 Series C-3310AM is an 8 sq. ft. inner replacement filter cartridge engineered specifically for Master Spas Eco-Pur filtration systems. Constructed with 3 oz. Reemay 2033 antimicrobial-treated filter media — denoted by the "AM" suffix — this cartridge inhibits microbial growth within the filter media itself, helping to extend service life and maintain filter efficiency between cleanings. With 150 precision-set pleats and exact dimensional tolerances, the C-3310AM delivers a drop-in replacement fit within the Eco-Pur inner cartridge position.

⚠️ IMPORTANT: This Is the Inner Cartridge Only
The Eco-Pur filtration system uses a nested inner/outer cartridge design. This listing is for the inner cartridge (C-3310AM) only — a complete filter service also requires an outer cartridge. Depending on your Eco-Pur canister, the compatible outer cartridge is either the Unicel C-7330 (30 sq. ft.) or the Unicel C-8341 (40 sq. ft.). Verify your outer cartridge model before ordering.

Specifications

Filter Area	8 sq. ft.
Length	7"
Outer Diameter	3 7/8"
Top Inner Diameter	2 3/16"
Bottom Inner Diameter	2 3/16"
Material	3 oz. Reemay 2033 w/ antimicrobial
Pleat Count	150
Top Cap: open	Bottom Cap: open

Note from Unicel: Manufactured with antimicrobial filter media; used in conjunction with Unicel C-7330 or C-8341 outer cartridges in Eco-Pur filtration systems.

Fits into:

(This is not an exhaustive list.)

Also known as: C3310AM