Goose Neck Flexible Pipe is an S-shaped section of pipe that provides flexibility for movement of the service or water main without breaking the connection. These services run from the gooseneck to the curb stop. These are the valves that are located near the property line. Goose Neck Flexible Pipe comes with strength and flexibility. These are soft galvanized iron wire that is wrapped and compressed into the gaps of the spring coil. This friction between these two wires gives the gooseneck the ability to stay in position after you bend it.