✨ New Arrivals Just Dropped!Explore
Product image 1
Product image 2
Product image 3
Product image 4
HomeStore

4 x 21" Filter Cartridge - Refillable

4 x 21" Filter Cartridge - Refillable

Looking for a refillable filter cartridge for 4x21" housings? This is it. These refillable cartridges fit the 4x21" housings from many different manufacturers.

Fill with our virgin bulk DI resin to save big on your filter cost. Holds 1/10 of a cubic foot of DI resin.

$50.91
4 x 21" Filter Cartridge - Refillable—
$50.91

Product Information

Shipping & Returns

Description

Looking for a refillable filter cartridge for 4x21" housings? This is it. These refillable cartridges fit the 4x21" housings from many different manufacturers.

Fill with our virgin bulk DI resin to save big on your filter cost. Holds 1/10 of a cubic foot of DI resin.

You may also like

NEW
Thumbnail 1Thumbnail 2

4 x 30" Filter Cartridge - Refillable

$57.87

NEW
Thumbnail 1Thumbnail 2

4 x 21" Filter Cartridge - DI Resin

$119.16

NEW
Thumbnail 1Thumbnail 2

4 x 21" Filter Cartridge - Carbon

$86.09

NEW
Thumbnail 1Thumbnail 2

4 x 40" Filter Cartridge - Carbon

$132.29

NEW
Thumbnail 1Thumbnail 2

4 x 40" Filter Cartridge - Refillable

$65.61

NEW
Thumbnail 1Thumbnail 2

4 x 40" Filter Cartridge - DI Resin

$198.96

NEW
Thumbnail 1Thumbnail 2

4 x 30" Filter Cartridge - DI Resin

$172.88

NEW
Thumbnail 1Thumbnail 2

4 x 30" Filter Cartridge - Carbon

$112.34

NEW
Thumbnail 1Thumbnail 2

Skid Mount Filter Pack

$205.25