What is the common operating pressure for natural gas in water column inches?

The common operating pressure for natural gas is typically measured in water column inches, which is a unit that expresses the pressure exerted by a column of water. In residential applications, the standard operating pressure for natural gas appliances is generally set at 3.5 inches of water column. This measurement is crucial for ensuring that appliances receive the correct amount of gas for efficient operation without causing issues related to insufficient or excess pressure.

This specific pressure allows gas appliances, such as furnaces and water heaters, to function safely and effectively. It ensures that the appliances can ignite properly and maintain consistent operation. While other options reflect various pressures used in different contexts (for example, certain commercial applications or specific equipment), 3.5 inches stands out as the accepted standard for residential natural gas systems. Understanding this pressure is vital for anyone working with gas installations to ensure compliance with safety standards and efficient performance of gas devices.