Got air trapped in your heating system? This CALEFFI 1/2” automatic air vent can help. It's brand new, designed to fit Ravenheat models like the 5015015, and works to automatically release air from boilers, radiators, or hydronic systems. Keeping air out of your pipes improves efficiency, reduces noise, and prevents cold spots. Installation is simple—just screw it into the appropriate port. Made by CALEFFI, a trusted name in HVAC parts, so you know it's reliable. No EAN, but it's a genuine replacement part. Whether you're a homeowner tackling a heating issue or a pro doing maintenance, this vent keeps your system running smoothly. Say goodbye to gurgling radiators and hello to consistent heat. A small part that makes a big difference in comfort and performance.