... ,particles.(2)Filtration rate:1mic,5mic,10mic(3)Standard length:10",20",10" BB,20" BB( ... -filtration or pre-treatment in RO application(5)Designed to be used in most standard-size housings(6)Performance ... is reached,or when flow becomes too slowInstall in appliance with state and local laws and regulations. ... water treatment system and not necessarily in your water CTO carbon block water filter cartridge