During installation, what is the desired position of vent pipes in relation to the fill pipe opening?

The desired position of vent pipes in relation to the fill pipe opening is higher than the fill pipe. This is critical for ensuring proper venting during the tank filling process. When the vent pipe is positioned higher, it prevents backflow or fluid from entering the vent system, which could happen if the vent pipe is lower than the fill pipe. This design helps to manage the pressure differential that occurs as fuel is being pumped into the tank, allowing any displaced air to escape properly, thus preventing possible over-pressurization and maintaining a safe fill process.

This positioning also aids in minimizing the risk of environmental contamination by ensuring that any overflow has a clear pathway and does not intersect with the vent system, keeping it clear and functional. Proper installation practices follow safety codes and standards designed to prevent leaks and other potential hazards associated with fuel storage systems.