Fits Espring Uv Systems – Our Patented Carbon-Block Filter‡ Effectively Reduces More Than 140 Potential Contaminants While Allowing Beneficial Minerals To Pass Through Uv Lamp Eliminates 99.99% Of Waterborne, Disease-Causing Bacteria, Viruses And Cysts.|Fits Espring Uv Systems – Our Patented Carbon-Block Filter‡ Effectively Reduces More Than 140 Potential Contaminants While Allowing Beneficial Minerals To Pass Through Uv Lamp Eliminates 99.99% Of Waterborne, Disease-Causing Bacteria, Viruses And Cysts.