What pressure drop is acceptable for residential gas piping installations?

In residential gas piping installations, an acceptable pressure drop is typically recognized as 0.3 inches of water column (W.C.). This value ensures that the gas flow remains sufficient for appliances to operate efficiently while maintaining safety standards. A pressure drop greater than this threshold could lead to decreased performance of gas appliances, posing a risk of incomplete combustion and potential safety hazards.

This guideline is based on the need for adequate fuel supply for various gas-operated devices in a home, such as furnaces, water heaters, and stoves. Maintaining a pressure drop at or below 0.3 inches W.C. helps to ensure that there is enough gas pressure reaching appliances during operation, which is critical for optimal functioning and safety.