Ideal automatic air vent kit 170988

This automatic air vent is a genuine spare for use in the pump section of Ideal Isar, Mexico, Esprit 2, Evo, Istor and Icos units. A central heating safety device, the air vent releases built up air. As water flows through the system, a float opens or closes the vent depending on the water level. When the system is full the float is pushed to the top, closing the vent until the water level drops.