Air pumps for Grabner flat valves can be equipped with the Grabner bayonet adapter. The adapter has a connection for ½ inch and ¾ inch hoses. The adapter must be plugged directly onto the hose. If another adapter is already attached or glued to a pump (e.g. high-pressure bellows), this must first be removed or cut off.
To inflate, the Grabner bayonet adapter is placed on the valve and turned by a quarter. This keeps the valve open when inflating and no air can escape.
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