This Navien residential neutralizer kit is designed to neutralize acidic condensate from high-efficiency gas appliances before it can damage plumbing systems or septic tanks. The kit includes a neutralizer cartridge filled with a special media that raises the condensate's pH level, making it safe for disposal. It also contains all necessary fittings and tubing for easy installation. The neutralizer cartridge lasts approximately one heating season and should be replaced annually or when the media is fully dissolved.