I think you could mean the Hess gas station. It's less than 10 minutes from the main entrance to the Boardwalk. If you walk out the front door of the Boardwalk, following the pathway towards the buses and convention center. When you come to the fork, go to the left (not towards the buses), and follow that walkway out to the street. Then you have to cross the street, and the Hess Station is visable to your right. They do have water and soda (coke products only), and snacks. It's a nice selection, an a bit cheaper than Disney prices.