What is a common requirement for gas piping installations in residential buildings?

For gas piping installations in residential buildings, grounding is a common requirement to prevent any potential static discharge. Grounding the piping system helps to ensure that any electrical charge that might accumulate can be safely dissipated into the ground. This is critical in preventing risks such as electric shock or fire, especially in environments where gas is present, as static electricity can ignite flammable gases.

While other options might relate to various safety practices in different contexts, grounding specifically addresses the electrical safety concern associated with gas piping. Proper grounding is required to maintain electrical safety standards, as gas piping systems can become energized due to faults or other nearby electrical installations. Ensuring that these systems are properly grounded is a key part of protecting both the infrastructure and the inhabitants of a residential building.