The automatic air vent is a pressure safety device in the central heating unit. They work by using buoyancy to release built up air. As water flows through the heating/cooling system a float within the aav (automatic air vent) opens or closes dependant on
Colour: Gold
Comes with O-ring
Fits Multiple Glow-worm appliances
Technical specification
TypeAutomatic Air VentManufacturer Model No2000800153Brand NameGlow-worm