Type G head is a trilobe head, used by some of the main Spanish breweries. This system gets its name from the British developer, Grundy. The valve face can be thought of as a circle with three sides cut off. This type of dispenser is used by breweries such as Bass, Boddingtons, Caffrey, Anchor Steam and Damm.
The dispenser is connected to the spear by slightly turning the head until the top