The pressure at the fuel supply inlet to an appliance shall not exceed what gauge pressure?

The maximum gauge pressure specified for the fuel supply inlet to an appliance is critical for safe and efficient operation. A gauge pressure of 3 psi is established as it allows for the necessary flow of fuel without exceeding the operational limits of the appliance, which could lead to malfunctions or safety hazards.

Keeping the pressure at or below this level helps ensure that the components of the fuel system do not become overstressed or damaged. It also helps prevent leaks, spills, or other unsafe conditions that might arise from excessively high pressures. This regulation aims to maintain safety standards while ensuring that the appliance can function properly and efficiently.

In comparison, pressures higher than 3 psi, such as 4 psi and 5 psi, could create risks associated with leaks or explosions, thus they would not be suitable for keeping the system safe and compliant with industry regulations. Therefore, the established limit of 3 psi ensures a good balance between performance and safety for fuel appliances.