5 MICRON RATED CTO CARBON BLOCK* FOR REVERSE OSMOSIS SYSTEM Reduces taste, odor, sediment, chlorine and certain VOCs Will not release carbon fines Service life up to 2500 gallons Fits standard 10″ filter housings *Nominal rating will remove >85% of particulate of given size from water with single pass filtration CTO 5 MICRON CARBON BLOCK PRE FILTER Carbon block pre filter is often used as the second stage filtration after the sediment filter for reverse osmosis systems water purification. The 5 µ carbon block pre-filter removes organics and chlorine from the feed water that can damage the membrane. NOTE: Place cartridge in an appropriate housing and flush for a minimum of 10-15 minutes prior to use. Use only with microbiologically safe and adequate disinfected water. This is a universal cartridge that can be used in any standard 10in filter housing.