What is the primary purpose of a gas pressure regulator?

The primary purpose of a gas pressure regulator is to maintain consistent gas pressure. Regulators are critical components in gas distribution systems as they ensure that the gas pressure is kept at a safe and usable level for appliances and equipment. By doing this, they help prevent fluctuations in pressure that could lead to inefficient operation or hazardous conditions.

In residential and commercial applications that use gas, varying pressure levels can lead to issues such as incomplete combustion, which reduces efficiency and can create carbon monoxide, a dangerous byproduct. A regulator effectively reduces the higher incoming pressure from the supply line to a stable output pressure that is suitable for the connected appliances, ensuring safety and efficiency in gas usage.

The other options do not accurately represent the fundamental function of a gas pressure regulator. While monitoring gas usage is important for energy management, it is not a role fulfilled by a regulator. Increasing gas pressure contradicts the function of a regulator, which is to reduce pressure. Storing excess gas is not applicable to a regulator's purpose, which deals with controlling the flow and pressure of gas rather than holding it.