Turbocharge Your Skills: Ace the G2 Gas Fitter Exam 2026 – Ignite Your Career Potential!

One psi (pound per square inch) is equivalent to 27.7 inches of water column, which is often approximated as 28 inches in many contexts. This conversion is essential knowledge for gas fitters as it allows them to understand and interpret pressure readings accurately when switching between different pressure measurement units.

The reason this approximation is used is that the density of water at standard conditions is utilized to define these measurements. When discussing gas pressures, particularly in residential and commercial applications, the concept of inches of water column is commonly employed, making it crucial for professionals in the field to be familiar with these conversions.

Understanding this conversion helps gas fitters ensure that their systems are operating within the appropriate pressure range, which is vital for safety and performance.