What is the function of a vault in gas services?

The function of a vault in gas services is primarily to house regulators for pressure monitoring. Vaults are specially designed structures that provide a controlled environment for equipment used in gas distribution systems. By placing regulators within a vault, it helps to ensure that they are protected from external environmental factors such as weather and vandalism.

These regulators are crucial for maintaining the appropriate pressure levels within the gas distribution network, enabling safe and efficient delivery of gas to consumers. The controlled environment of a vault also allows for easier access for maintenance and monitoring, ensuring that any necessary adjustments to gas pressure can be made quickly and safely.

The other options, while related to gas services, do not accurately describe the primary function of a vault. Storing excess gas and maintaining pipeline integrity are functions handled by different components of the gas infrastructure, and serving as a gas transfer point typically refers to locations where gas is moved from one system to another, rather than being a dedicated function of a vault.