ICEPURE CTO20-CQB 5 Micron 20 x 2.5 Inch Replacement for Pentair whole house filter​

A lead-focused carbon option

CTO20-CQB uses an enhanced coconut-shell carbon block designed for lead, chlorine, taste and odor reduction. The 20 x 2.5-inch cartridge is rated 5 microns on the original product label.

Choose 1 or 2 replacement cartridges for a compatible housing.

Match the housing model, cartridge end caps and seals before ordering. Dimensions alone do not confirm compatibility.

Use your water report to identify the concern you want to address. Compare the lead-focused CQB model with the carbon option already available for this size.

Compare the existing 20 x 2.5-inch CTO Carbon Block. Series links open the existing product page; choose its available pack there.

Already know your cartridge? Choose a pack in the purchase area. More cartridges do not add filtration stages.

Is a housing included?

This product supplies replacement cartridges for a compatible housing.

Does a larger pack mean more filtration stages?

No. Each pack contains the selected number of this cartridge model.

When should I replace a cartridge?

Follow the cartridge and housing instructions. Water quality and use affect replacement timing.