Technical Standards and Safety Authority (TSSA) G3 Practice Exam

What is the required pipe size for the branch line (B) supplying the gas range?

1. ¾ inch

2. ½ inch

3. 1 inch

4. 1 ½ inch

The correct answer is: ½ inch

The required pipe size for the branch line supplying the gas range is typically determined based on the BTU (British Thermal Unit) requirements of the gas appliance and the correct sizing principles outlined in relevant codes and standards. For most residential gas ranges, a ½ inch pipe is often sufficient to deliver the necessary gas flow to meet the appliance's requirements. This size ensures that there is adequate capacity while maintaining pressure and minimizing the risk of gas flow issues. Using a larger pipe size, such as ¾ inch or greater, may not only be unnecessary but can also lead to inefficient gas delivery because it could create a lower velocity of gas flow that might affect burner performance. Additionally, using a pipe size that is too large can lead to increased costs for material and installation without providing any practical benefit in this scenario. Therefore, the ½ inch pipe is the correct choice for standard residential gas range installations, aligning with the typical specifications derived from industry standards and manufacturer requirements.