Replacement Filters for Aquasana Drinking Water Filters Model – AQ-4025 Free Shipping All North America From Aquasana Replacement Filters for Aquasana Drinking Water Filters Model # AQ-4025 Regular Price $59.99 Our Low PriceĀ Filters last 6 months/500 gallons. Filters out lead, chlorine, VOCs, MTBE and chlorine resistant parasites/cysts. Sub micron filtration.