2 Pack Auto Drain Valve, DN15 G1/2 Inch Brass Exhaust Valve, Quick Drain with Filter for Solar Water Heaters

Material: Made of brass, safe and strong, durable, wear-resistant and high temperature resistant.Design: The steam and water collection tray is equipped with a special structure to ensure that no water leaks during the drainage process. Hole-shaped outlet hole with low resistance and elimination of safety risks.Automation: As long as there is a pressure difference between the inside and outside of the system, the outlet valve will continue to purge automatically.Easy to use: Equipped with a filter that can filter larger impurities and avoid blockages and damage to the valve body. DN15 1/2" threaded interface is suitable for most devices. Purpose: Suitable for removing excess air during the operation of HVAC systems and exhaust systems.