4½" x 20" Replacement Filter Cartridges
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Empty Semi-Clear Refillable Cartridge 4.5" x 20" for Big Blue 20" Housings with Sediment FilterSKU#:CP-EC2045WPrice: $25.80 As low as Price: $21.93 -
Empty Refillable Cartridge 4.5" x 20" for Big Blue 20" HousingsSKU#:EC2045WPrice: $24.80 As low as Price: $22.32 -
WECO Color Changing Deionizing Mixed Resin (DI) 4-1/2" x 20" Cartridge DI-2045-CLXSKU#:DI-2045-CLXPrice: $74.50 As low as Price: $64.82
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Big Blue 4.5" x 20" Carbon Block 0.5 Micron Water Filter Cartridge for Lead ReductionSKU#:CBPB-4520-0.5Price: $94.45 As low as Price: $85.01 -
Big Blue 4.5" x 20" Carbon Block 0.5 Micron Water Filter Cartridge for Chloramine ReductionSKU#:CBCM-4520-0.5Price: $101.87 As low as Price: $91.68 -
Pentair Sediment Bag Cartridge 4" x 18" 5 MicronSKU#:BP-420-5Price: $19.20 As low as Price: $18.24 -
US Made Carbon Block 4.5" x 20 Inch Big Blue Type 1 MicronSKU#:ACB-4520-1Price: $183.99 As low as Price: $156.39
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