The NAVIEN 30014216A Syphon & Hose is a condensate drainage component designed to efficiently collect and direct acidic condensate away from the heat exchanger in compatible boilers. Engineered for use with Navien NHB-055 and NHB-080 condensing boiler systems, it helps maintain proper system operation by preventing blockages and ensuring smooth condensate flow. https://www.partshnc.com/30014216a-navien-tankless-water-heaters-syphon-hose-nhb-055080