Products

Main Auto Air Vents

Main Auto Air Vents Main auto air vent (aav)  The automatic air vent is a pressure safety device in the central heating unit. They work by using flotation to release accumulated air. As water flows through the heating/cooling system, a float within the Main automatic air vent opens or closes depending on the water level.  …

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Ferroli Expansion Vessels

Ferroli Expansion Vessels Ferroli Expansion Vessels also known as expansion tank, air tank, built-in expansion vessels, 8 litre expansion in the boilers are to ensure that the pressure within the boiler operates within safe parameters normally between 1 to 2.5 bar. The expansion vessel should be half full of air and half full of water …

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