Which range represents the home gas pressure in inches of water column?

Which range represents the home gas pressure in inches of water column?

• A. 0-1" WC
• B. 7-8" WC
• C. 10-12" WC
• D. 20-25" WC

Answer: (B)

Gas pressure in homes is kept very low and is measured in inches of water column because this small unit lets us gauge the actual pressure needed to move gas through piping and into appliances. The service is regulated down to about seven to eight inches of water column (roughly 0.25 psi). That level provides enough flow for typical household burners and appliances while staying within safe, controllable limits. Pressures around seven to eight inches WC match the standard residential service that regulators maintain, so they’re ideal for home gas systems. Pressures in the single-digit inches WC range (0-1) are usually too low to reliably feed all appliances, while higher ranges like ten to twelve or twenty to twenty-five inches WC are beyond normal residential service and would require different equipment and safety considerations.

Gas pressure in homes is kept very low and is measured in inches of water column because this small unit lets us gauge the actual pressure needed to move gas through piping and into appliances. The service is regulated down to about seven to eight inches of water column (roughly 0.25 psi). That level provides enough flow for typical household burners and appliances while staying within safe, controllable limits. Pressures around seven to eight inches WC match the standard residential service that regulators maintain, so they’re ideal for home gas systems. Pressures in the single-digit inches WC range (0-1) are usually too low to reliably feed all appliances, while higher ranges like ten to twelve or twenty to twenty-five inches WC are beyond normal residential service and would require different equipment and safety considerations.