Your welcome. All you need is a gate valve between pump and hose to make it dry. As cars and roads improved the need for more gas at a stop was needed. That is why you find so many with gallon selector handle ran to last position and removed or cut off so door would shut and could be locked. Also some were changed for farm pumps where it wasn't that important to keep up with gas total sold. SO says DB our pump mentor,as he tried to help me get my head around it.

*Wanted Pierce Pennant Petroleum*