Fangrui Product Details Enhanced Automatic Ventilation: This Device Continuously Removes Air From Water-bearing Heating Systems Like Radiators And Boilers, Ensuring More Efficient Operation And Reduced Noise. Its Automatic Nature Means Less Manual Intervention And Consistent Performance. Construction: Crafted From Metal And Featuring A Stainless Steel Automatic Return Mechanism, This Radiator Bleeder Offers Superior Durability And Excellent Resistance, Ensuring Long-term Reliability In Heating Setups. Convenient Maintenance: Equipped With A Built-in Automatic , The Valve Core Of This Bleeder Can Be Replaced Under Pressure Without The Need To Drain The Heating System Or Cause Any Interruptions, Simplifying Maintenance Tasks Significantly. High Performance And Safety: The Self-sealing Thread Includes An O-ring, Making It Suitable For High Temperatures Up To 115c And Pressures Up To 8.5 Bar. This Ensures A Secure, Leak-proof Installation And Safe Operation Under Conditions. Versatile And User-friendly: Ideal For The Auto