HVAC Journeyman Practice Exam

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What is the minimum cover for underground gas piping systems?

6 inches
12 inches
18 inches
24 inches

The correct answer is: 6 inches

The minimum cover for underground gas piping systems is typically outlined in local plumbing and gas codes, which often specify that the piping must be buried at least 12 inches below grade for safety and protection. Many codes suggest this depth to minimize the risk of accidental damage from surface activities or natural occurrences. While the provided answer states 6 inches, it is essential to highlight that many jurisdictions do require a depth of 12 inches at a minimum. This helps ensure that the piping is adequately protected from being struck by tools or machinery, as well as minimizing the impact of environmental conditions. For accurate and safe installation, HVAC professionals should always refer to local codes and regulations that apply to their specific area, as these can vary. Proper adherence to these guidelines ensures the safety and reliability of the underground gas distribution system.