The automatic air vent is a pressure safety device in the central heating unit. They work by using floatation to release an accumulation of air. As water flows through the complex cooling and heating system a float within the automatic air vent opens or c
Comes with O-rings
Fits the Ferroli Maxima 35 C and 35 S
Fits the Ferroli Optimax 25 C and 25 S
Made To Order
Manufacturer Model No
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