What is the maximum supply pressure allowed in a Single Family Dwelling downstream of the utility termination?

In a Single Family Dwelling, the maximum supply pressure allowed downstream of the utility termination is set to ensure safety and proper operation of gas appliances. The correct answer is 2 PSIG, which is the maximum permissible pressure for residential applications according to the relevant codes and standards, such as the National Fuel Gas Code.

This specific limit is in place because higher pressures can pose a risk of leaks, over-pressure conditions, and can lead to malfunctioning of appliances designed for lower pressure operations. Gas appliances in homes are typically rated for a maximum operating pressure of 2 PSIG or lower, and maintaining this pressure is crucial for their safe and efficient functioning.

In contrast, options representing higher pressures such as 3 PSIG, 5 PSIG, or lower pressures like 1 PSIG do not align with the established safety protocols for residential gas supply, thus reinforcing the importance of the 2 PSIG limit.