- Ultraviolet sterilizers clean water and kill bacteria such as E. coli - 55W UV sterilizing filter has the capacity of sterilizing up to 2700 liters per hour - Can be added onto existing whole house water filter systems - Simple and easy to install and maintain Adding a UV sterilizer onto a water filtration system is a well-known practice in domestic, commercial and industrial applications. This post filter is essential for purifying water that has been exposed to contaminants such as Cysts, Bacteria, Coliform, Flu, Salmonella, Polio, Giardia, Dysentery, E.coli, Cholera, Cryptosporidium, Meningitis, Typhoid, Infectious, Fever & Hepatitis.