Unicel 4CH-949 Replacement Filter Cartridge | 50 sq. ft. | Spa Skimmer

The Unicel 4000 Series 4CH-949 delivers 50 sq. ft. of filtration surface area across 210 precision-pleated folds of 3 oz. Reemay 2033 polyester media — purpose-built for top-load spa skimmer systems using a 1-1/2" male SAE stand pipe. The 2" female SAE threaded bottom cap threads directly onto the standpipe for a secure, tool-free installation, while the v-groove semi-circular handle allows easy cartridge removal without breaking the seal prematurely.

⚠️ IMPORTANT: Verify Overall Length Before Ordering (Master Spas Eco-Pur Systems)
The 4CH-949 fits select Master Spas Eco-Pur filtration systems designed for a 5" OD cartridge (actual OD: 4 15/16"). However, Eco-Pur systems span multiple model years and configurations — always confirm the overall length (OAL) of your existing cartridge matches 13 1/2" before ordering to ensure a correct fit.

Specifications

Filter Area	50 sq. ft.
Length	13 1/2"
Outer Diameter	4 15/16"
Top Inner Diameter	N/A
Bottom Inner Diameter	N/A
Material	3 oz. Reemay 2033
Pleat Count	210
Top Cap: v-groove semi-circular handle	Bottom Cap: 2" female SAE thread

Note from Unicel: For use on 1-1/2" male SAE stand pipe.

Fits into: