1.022102 Automatic Air Vent

Alpha 1.022102 Automatic Air Vent

This part fits the following:

Alpha CD 25 C
and Alpha CD 28 C
with Alpha CD 35 C
plus Alpha CD 25 X
fits Alpha CD 28 X
and Alpha CD 12 S

More information:

• The automatic air vent is a pressure safety mechanism in the central heating unit.
• They work by using a float to release built up 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.