Abstract: A tap operated by a push button which acts to open a valve member which is biassed to the closed position, the valve member being for normal operation of the tap; also operated by the push button is a seal piercing means which pierces a diaphragm in or adjacent the tap inlet and which after initial operation of the push button remains lodged in the pierced diaphragm, the piercing means only being moved by the push button on the initial operation. The arrangement ensures an added protection against oxygen penetrating into a container fitted with the tap and is particularly useful for wine containers where the added protection ensures a longer shelf life.

Abstract: A tap operated by a push button which acts to open a valve member which is biassed to the closed position, the valve member being for normal operation of the tap; also operated by the push button, but only on initial operation of the push button, is a plugging means which plugs the inlet of the tap and which after the initial operation remains out of the inlet. The arrangement ensures added protection against oxygen penetrating into a container fitted with the tap and is particularly useful for wine containers where the added protection ensures a longer shelf life. The use of a plugging means fitted tap avoids the necessity of special sealing equipment for the containers in the winery where containers are filled.