The AERCO Boiler and Water Heater 89026 Neutralization Media is a specialized treatment material designed to neutralize acidic condensate produced by high-efficiency heating equipment. It works by chemically raising the pH of condensate as it passes through the neutralizing media before discharge into the drainage system. Designed for use with compatible AERCO boilers and water heater... https://www.partshnc.com/89026-aerco-boiler-and-water-heater-neutralization-media