Power up your AquaBrick® Water Purification System with the DuraFlo™ replacement filter from Sagan Life. The DuraFlo™ effectively removes virus, bacteria, giardia, cryptosporidium, and other water-borne toxins and chemicals from ANY non salt water source. Compatible with countertop, gravity-fed & candlestick water filter systems. HIGHLY EFFECTIVE REPLACEMENT FILTER FOR MOST COUNTER TOP, GRAVITY FED WATER FILTER SYSTEMS, INCLUDING BERKEY®. INCLUDES FILTER ONLY