The Carbon Block CTO water filter cartridges by Express Water are used for reverse osmosis systems & other water filtration systems. This filter has been tested and verified by independent Laboratory testing and also meet the NSF Standards and Industry Regulations. Key Specs ...The Carbon Block CTO water filter cartridges by Express Water are used for reverse osmosis systems & other water filtration systems.
This filter has been tested and verified by independent Laboratory testing and also meet the NSF Standards and Industry Regulations. Key Specs include a 5 micron nominal rating & removal of Chlorine, organic chemicals, unnatural tastes and odors found in TAP water. They are made of fine COCONUT SHELL carbon that offers a much finer filtration of suspended particle, chemicals, & dirt.