iSpring FC25B High Capacity Big Blue Whole House Water Filter CTO Carbon BLOCK, 4.5x22 x 20x22

Usually used as the second stage for 20 inch Big Blue whole house filters. The carbon block filter is manufactured using a continuous extrusion process. It consists of a high quality virgin premium performance Activated Carbon. It is effective in reducing free chlorine, bad taste, odour THM, Organics, hazardous chemicals, and pesticides. Depending on the inlet water quality or flow rate, it needs to be replaced every 6 months or 100,000 Gal. of water.