Our countertop water filters are a breeze to install. These countertop water purifiers provide up to 3 years of filtration on one cartridge. Choose from a single or double filtration model, in a wide choice of colors or a chrome finish. There is also a UV (ultraviolet) model designed for bacteria in water. See the water filter comparison chart below to compare different models. With prices starting at just $99, you're sure to find one that meets your needs.