Question

Where piping systems serving appliances designed to operate with a gas supply pressure of 14 inches water column or less are required to be equipped with overpressure protection, each device shall be adjusted to limit the gas pressure to each appliance to _________ psi or less upon failure of the line pressure regulator?

1) 10
2) 12
3) 14
4) 16

Answer 1

Overpressure protection devices for gas appliances should limit the gas pressure to 0.5 psi or less upon failure of the line pressure regulator.

Step-by-step explanation:

When piping systems serving appliances designed to operate with a gas supply pressure of 14 inches water column or less require overpressure protection, the device should be adjusted to limit the gas pressure to each appliance to 0.5 psi or less upon failure of the line pressure regulator.

This is to prevent potential damage to the appliance or a hazardous condition from occurring due to excessive gas pressure.