What is the minimum backfilled cover for buried piping where physical damage is prevented?

The minimum backfilled cover for buried piping where physical damage is prevented is specified as 18 inches. This requirement ensures adequate protection for the piping from external forces and potential damage, while also allowing for an effective installation without excessive depth that could complicate maintenance and future access.

In situations where there is a risk of physical damage, the 18-inch cover provides a reasonable balance between safety and practicality. It helps to shield the pipeline from frost heaves, soil erosion, and impacts from surface activities, such as vehicle traffic or construction work. Proper cover depth aims to prevent both external mechanical damage and environmental factors that could compromise the integrity of the piping system.

It’s crucial to adhere to this specified minimum cover depth to ensure the long-term reliability and performance of the buried piping systems.