What is the common operating gas pressure for natural gas?

The common operating gas pressure for natural gas in residential applications is typically around 3.5 inches of water column. This measurement is crucial because it indicates the pressure required for proper operation of natural gas appliances and systems. A pressure that is too low may cause appliances to underperform, while excessive pressure can create safety hazards and lead to equipment damage.

In contrast, other pressures listed as options may pertain to different types of equipment or specific applications, but they do not represent the standard operating pressure found in typical household settings. Using the correct pressure ensures that appliances such as furnaces, water heaters, and stoves operate efficiently and safely. Understanding the standard of 3.5 inches of water column is essential for any HVAC technician to ensure proper installation and maintenance of gas systems.