The Xylem-Bell & Gossett 113001-7 Air Vent is a 1/8-inch female automatic air vent designed for use in hydronic HVAC systems. It efficiently removes trapped air from radiators, baseboard heaters, and piping, improving system performance and preventing noise or air blockages. Commonly used in boilers and closed-loop heating systems, this compact vent enhances circulation and heat distr... https://www.partshnc.com/113001-xylem-bell-gossett-7-air-vent-18-female-75