Premium material: Our solar water heater is made of high-quality brass, the interior is cast with high-precision parts, and the drain mechanism is stable and reliable. Design AutomationIf the system is powered by water or the system pressure is too high and a complete drain is required, this automatic pressure relief valve can operate reliably. As long as there is a pressure difference between the inside and outside of the system, the radiator purge valve continues to ventilate. Easy to disassembleTo ensure that no No water is discharged during the outlet process, our automatic purge valve uses a special structure for the design of steam and water separation tank. Easy to disassemble and repair the devices, so the system does not need to be drained. Package contents: 2 pieces with DN15 thread brass automatic heater drain, size: 66 45 mm, remove excess air during the operation of the exhaust system and Hvac system. ApplicationThe solar air vent valve is used to vent the air 'excess air during the operation of the exhaust system and HVAC system, and is characterized by high temperature resistance, rust protection and reliable sealing. Note: due to shooting angle and light problems, the color of the physical object differs from the picture.