Technical Standards and Safety Authority (TSSA) G3 Practice Exam

What is the required pipe size for the branch line supplying a gas range?

1. ¾ inch

2. ½ inch

3. 1 inch

4. 1 ½ inch

The correct answer is: ¾ inch

The appropriate pipe size for the branch line supplying a gas range is determined by the gas range's BTU input requirements and the overall system design. A ¾ inch pipe is typically sufficient for most standard gas ranges, as it can handle the necessary volume of gas without significant pressure drop. Using a ¾ inch pipe ensures that the gas flow to the appliance is optimal, allowing for efficient operation and the full function of the range's burners. Additionally, going too large with the pipe size can lead to issues such as insufficient velocity, which may affect the appliance’s performance. Smaller pipe sizes, such as ½ inch, may not provide adequate capacity for larger ranges, especially those with higher BTU ratings. Similarly, larger sizes like 1 inch or 1 ½ inch are generally unnecessary and could lead to difficulties in installation and increased costs without any benefit for a typical gas range.