Keston Lpg Boiler Auto Air Vent (Aav)
The automatic air vent is a safety device within the central heating unit. They work by using buoyancy to release accumulated air. As water flows through the heating/cooling system, a float within the automatic air vent opens or closes depending on the water level. If the system contains no air, the float will be pushed to the top and the vent will be closed until the water level drops.
KESTON B04220003 3/8 INCH AUTO AIR VENT
Part No: 1630410 / MPN: B04220003
KESTON B04229002 3/8 INCH AUTO AIR VENT KIT
Part No: 1630450 / MPN: B04229002