7100445 - Full Flow Granular Activated Carbon Cartridge 20 X 4 1/2 Water Washed Coconut ShellThis 20 inch Full Flow granular activated carbon cartridge with up to 20,000 gallons capacity media is a water washed type coconut shell filled with granular activated carbons to remove taste, odors and chemicals. The body is made of NSF listed polypropylene. The minimum water pressure required is 20 psi with the maximum of 125 psi. The temperature maximum rating is 100 F (38 C). Features Water washed coconut shell housing Contains granular activated