Halstead Auto Air Vent (Aav)
The automatic air vent is a pressure safeguard in the central heating unit. They work by using a floatation device to release accumulated air. As water circulates through the heating/cooling system, a float within the automatic air vent opens or closes depending on the water level. If the system is full of water, the float will be pushed to the top and the vent will be closed until the water level drops.
HALSTEAD 450908 ALTECNIC AUTO AIR VENT 502630
Part No: 1291942 / MPN: 450908
HALSTEAD 500674 AUTO AIR VENT
Part No: 1296954 / MPN: 500674
HALSTEAD 500752 AUTO AIR VENT INC SEAL
Part No: 1299888 / MPN: 500752
HALSTEAD ED801898 AUTOMATIC AIR VENT
Part No: 1296586 / MPN: ED801898
HALSTEAD 851025 AUTOMATIC AIR VENT
Part No: 1293602 / MPN: 851025