Efficient air removal Quickly expels trapped air from radiator and HVAC systems to promote smooth operation and improve heating efficiency with the 1/2 inch brass automatic vent valve. Durable construction DN15 brass body with a corrosionresistant finish and a special protective coating to forestall rust in moist environments, delivering reliable performance over time. Reliable automatic pressure relief Precisionengineered internal components automatically activate to release excess pressure, helping maintain system safety and prevent damage. Easy maintenance design Demounts and cleans with ease without the need for specialized tools, making it suitable for general home heating systems. Specifications and compatibility Size: 1/2 inch (DN15) Material: Brass with protective coating Type: Automatic vent valve Applications: Radiator and HVAC systems Use scenarios installation or commissioning: vent air from a fresh radiator loop to ensure proper filling and maximize heating efficiency. Regular system maintenance: bleed air periodically to prevent air pockets, reduce noise, and improve performance in a central heating setup. Moist environments: install in basements, boiler rooms, or other humid areas where corrosion resistance is important to extend valve life.