Abstract: An air vent valve assembly for a tank assembly of a beverage maker for aircraft includes a valve housing having an interior chamber and an inlet flow passage in fluid communication with the interior chamber, and a valve base that mates with the valve housing. The valve base is configured and adapted to be attached to a tank assembly of a beverage maker. The valve base includes an interior flow chamber in fluid communication with the interior chamber of the valve housing and a flow outlet in fluid communication with the interior flow chamber of the valve base. The air vent valve assembly includes an umbrella valve operatively connected to at least one of the valve housing or the valve base between the flow outlet of the valve base and the inlet flow passage of the valve housing.