Technical Standards and Safety Authority (TSSA) G3 Practice Exam

What is the required pipe size for the main supply line supplying the gas range?

1. ¾ inch

2. ½ inch

3. 1 inch

4. 1 ½ inch

The correct answer is: 1 inch

The required pipe size for the main supply line supplying the gas range is determined by factors such as the total BTU input of the appliances being supplied, the length of the piping run, and the pressure drop that can be tolerated in the system. A 1-inch pipe is appropriate for many residential gas applications, as it can effectively handle higher BTU loads and is suitable for longer distances without significant pressure loss, ensuring that the gas range receives an adequate supply of gas for optimal performance. In this context, using a 1-inch pipe ensures that even if there are multiple appliances or if the range has a high BTU requirement, there will be enough capacity to maintain efficient operation and prevent issues related to gas shortages. It effectively balances the need for volume and pressure within the gas supply system. Smaller pipe sizes, such as ¾ inch or ½ inch, may limit the volume of gas that can be delivered, which could lead to reduced performance or safety issues when the range is in use. Larger pipe sizes, such as 1 ½ inch, may not be necessary in typical residential applications and can lead to installation complexities and increased costs without providing additional benefits.