What is the minimum size gas pipe that can be run to an appliance?

The minimum size gas pipe that can be run to an appliance is typically 1/2 inch. This size is standard for many residential appliances such as water heaters, furnaces, and stoves that require a moderate amount of gas flow. The 1/2 inch pipe is designed to meet the needs of these appliances, ensuring they operate efficiently and safely by providing adequate gas supply without risking pressure drop or insufficient flow.

Using a larger pipe, such as 3/4 inch or 1 inch, may not be necessary for smaller appliances and could lead to wasted resources and unnecessary expenses. Additionally, running a pipe that is too small, such as 1/4 inch, would not be effective for gas delivery, possibly resulting in inadequate supply and performance issues for the appliance. Therefore, 1/2 inch is established as the minimum to ensure proper function and safety in a standard installation.