.The Xylem Bell & Gossett 113222-97 Air Vent (1/8" NPT, 150 PSI, 240°F) is a high-quy automatic air vent designed for hydronic heating and cooling systems. It efficiently removes trapped air falitrom piping, boilers, radiators, and other HVAC equipment, preventing air pockets that can reduce system performance and cause noise or corrosion. By ensuring optimal circulation, it enhances ... https://www.partshnc.com/113222-xylem-bell-gossett-97-air-vent-18-npt-150-240f