NSF Certified The H-104 Drinking Water System reduces lead to below the Federal Action Levels. Submicron filtration also reduces or removes: off-tastes, odors, chlorine, dirt, rust, parasitic protozoan cysts such as cryptosporidium & giardia, asbestos fibers, & 99.99% of all particles ½ micron & larger in size. Includes Quick-change head assembly w/built-in shut off, Quick connect fittings and cartridge. Contains a lime-scale inhibitor feature to extend appliance life.