Features The exhaust mechanism is very reliable and is cast from high-precision components. It can work reliably, either when the system is operating with added water, or when the system pressure is too high and adequate drainage is required. The steam and water separation tray is designed with a special structure to ensure that the water will not be drained out during drainage. It is convenient to disassemble and maintain it, while the water from the system will not drain, so there is no need to drain the system. This valve features high temperature resistance, rust protection and reliable sealing. As long as the system has pressure, the exhaust valve will continue to ventilate. Remove excess air during operation of exhaust system and HVAC system. Specification: Material: Brass Thread Size: DN20 G3/4 Length: 7 cm/2.8 inches. Width: 4.8 cm/1.9 inches. Weight: about 132g/4.7oz Package list: 1 x Brass Automatic Vent Valve Note: Please note that the new type and old type of this product will be sent at random, and make sure you do not mind before ordering. Package List