If a vapor return pipe is located inside the dispenser housing, what must it be equipped with?

When a vapor return pipe is located inside the dispenser housing, it is essential for it to be equipped with a shear section or flexible connector. This requirement is critical for safety and operational efficiency in underground storage tank (UST) systems.

The presence of a shear section or flexible connector allows for movement and flexibility in the piping system. In the event of an accident, such as a vehicle striking the dispenser, the shear section is designed to break away safely without causing damage to the entire system. This helps prevent spills or leaks of volatile vapors that could pose a fire hazard or environmental concerns.

A shear section or flexible connector thus serves as a crucial safeguard by maintaining system integrity while allowing for necessary movement, while enhancing the safety measures for vapor recovery systems typically associated with fuel dispensing.