The automatic air vent is a pressure safeguard in the central heating unit. They work by using a float to release an accumulation of air. As water flows through the heating/cooling system a float within the aav (automatic air vent) opens or closes dependa
Supplier Part Number: 061707
Comes with O-ring
Technical specification
TypeAutomatic De-AeratorMaterialBrassColourNaturalManufacturer Model No061707Brand NameVaillant