What is the normal natural gas building line pressure for a single-family residence?

The normal natural gas building line pressure for a single-family residence is typically 7 inches of water column. This pressure is standard for residential applications to ensure the safe and efficient operation of gas appliances.

7 inches of water column pressure is sufficient to deliver natural gas to appliances like furnaces, water heaters, and stoves, ensuring they can operate effectively without risk of back drafts or insufficient gas flow. Maintaining this pressure is crucial for the performance of these appliances, as pressures that are too low may hinder combustion efficiency, while excessively high pressures can pose safety hazards.

The other pressure levels listed—such as 3, 5, and 10 inches of water column—are not standard for residential buildings. While 3 and 5 inches might be more common in specific applications or certain regional systems, they do not typically meet the requirements for overall gas line pressure in a single-family home. A pressure of 10 inches would exceed what is usually necessary and could create safety issues or operational problems with household appliances designed for 7 inches.