CR Spotless 1 Cartridge Refill - 300 Gallon Unit

Swap out your cartridges in your CRSpotless Water De-ionizer with ease. Simply unscrew the watertight housings and remove the spent cartridge. Then, put the replacement cartridges inside the tube and reattach it to the body of the unit.You'll receive two replacement cartridges that will de-ionize up to 100 gallons or 300 gallons (based on the size you select and your local water quality). Please note that the 300 gallon cartridge will not fit in the 100 gallon unit and vice versa.