Combi Ecotherm Phoenix Puma Air Bleed Valve 10/18728

Potterton Air Valve 10/18728

For use with the following Potterton boilers;

Potterton COMBI 100
and Potterton COMBI 80
with Potterton ECOTHERM EG
plus Potterton ECOTHERM EGC
fits Potterton ECOTHERM EGCV
and Potterton PHOENIX
with Potterton PUMA 100 (SIT/HONEYWELL)
plus Potterton PUMA 100E (SIT/HONEYWELL)
fits Potterton PUMA 80 (SIT/HONEYWELL)
and Potterton PUMA 80E (SIT/HONEYWELL)
with Potterton PUMA FLOWSURE +

The automatic air vent is a pressure safety mechanism in the central heating unit.

They work by using floatation to release built up 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.

Packing is a bit tatty from storage