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 complex cooling and heating system a float within the aav (automatic air vent) opens or closes
Colour: White
Fits a number of Worcester Appliances
Technical specification
Product TypeSealTypeSealsToilet Cistern CapacityFTW--ERP RatingNot ApplicableSupplier Part Number87161407040Brand NameWorcester Bosch