What range should the total pressure drop from the gas meter to the farthest outlet be?

The total pressure drop from the gas meter to the farthest outlet is critical for ensuring safe and efficient gas distribution in a plumbing system. A range of 0.2 to 0.5 inches of water column (wc) represents an acceptable pressure drop that balances adequate gas delivery to appliances while minimizing the risk of inefficiency or operational issues.

Maintaining a pressure drop within this range protects against potential fluctuations in gas pressure that may lead to appliances underperforming or shutting down due to insufficient gas supply. Too low of a pressure drop might not effectively identify system resistances, while too high could indicate significant issues in the piping system that may require attention to ensure reliable operation. This standard range reflects practices based on various plumbing codes and the need for optimal gas appliance operation.

Additionally, the answer aligns with common industry practices that advocate for adequate supply pressure, especially in systems with multiple outlets where the cumulative resistance could lead to performance issues if not properly managed. Hence, the chosen range helps achieve a balance between efficiency and safety in gas supply systems.