The PurestOne (tm) CT-1 Counter Top Water Purifier Filter System. Removes harmful heavy metals such as: Lead and Mercury. Removes microorganisms, Giardia and Cryptosporidium without the use of chemicals. Removes harmful chemicals such as Chlorine, Chloroform, Pesticides, Trihalomethanes (THM's), Polychlorinated Biphenyls (PCB's), Trichloroethylene (TCE) and Benzene. Does not remove dissolved minerals essential for good health including: Calcium, Magnesium, Potassium and Fluoride. Has a Lifetime Warranty on the housing and clamp against breakage or leakage under normal use.