What type of activated carbon is used in the 14-CB carbon block and 14-GAC granular carbon series filter cartridges?

They are made from 100% premium coconut shell activated carbon which provides a nice, mild taste. A filter with carbon block or granular activated carbon (GAC) is a proven option to remove certain chemicals, particularly organic chemicals, from water. GAC filters also can be used to remove chemicals that give objectionable odors or tastes to water such as hydrogen sulfide (rotten eggs odor) or chlorine.

Coconut shell activated carbon has a very high hardness and has a low level of dust. Being made from coconut shells, it is natural and environmentally friendly.