MCC-NH Gas Fitters Practice Exam

How far must gas piping outlets extend above the floor?

1. 1 inch

2. 2 inches

3. 3 inches

4. 4 inches

The correct answer is: 2 inches

Gas piping outlets must extend a minimum of 2 inches above the floor to ensure proper ventilation and prevent any accumulation of gas at ground level. This height requirement is important for safety, as it helps avoid potential hazards if a leak occurs. Gas is generally lighter than air, and while it may rise, having the outlets elevated allows for better dispersion and reduces the risk of gas pooling. This standard also aligns with various building codes and regulations governing gas installations, which seek to promote safety in residential and commercial settings.