Caleffi Automatic Air Valve C/W Check Valve 1/2′ M [Pack of 10]

[Pack of 10] Automatic Air Vent Horizontal Discharge Comes with a ½” Check Valve Altecnic series 502 automatic air vents are used in heating and air conditioning systems to continually remove air from the system without the need for manual adjustment. Excessive air within a system can cause excessive noise, reduce the accuracy of control valves and the performance of heating and cooling equipment. One of the most important functions of the Altecnic automatic air vents is to release air as the system is being filled with water and then automatically isolating, preventing water loss and wastage from the system.