Automatic Bleeding Radiator Valve, 3 Pieces BSP 1/2" Bleed Valve, Automatic Brass Air Vent, Cut-Off Air Relief Valve

【Self-Sealing】 The valve has a self-sealing thread with an O-ring. Automatic venting works using a spring-loaded disc. When in contact with water, the springs seal. When air enters, they open, allowing air to escape. Please ensure this valve is only suitable for heating water without additives.

【Utility】 This radiator valve is made of nickel-plated brass, highly resistant to corrosion and external factors. Suitable for both hot and cold water.

【3 Operating Modes】 1. Middle knob fully screwed in: automatic venting (automatically shuts off when no air enters the radiator); 2. Middle knob partially screwed in: vent open; 3. Release the middle button and the vent slot is closed.

【Durable Materials】 The radiator exhaust valve is made of sturdy and durable materials. The valve body and insert are made of nickel-plated brass. Thanks to the durable stainless steel automatic inspection system.

【Wide Applications】 Automatic ventilation saves time and effort, especially if there are many radiators in the house. You can also benefit from the standard size, as the 3 units fit all radiators with ordinary ½-inch vent plugs.