How high must all gas piping installed on top of roofs be elevated off the roof surface?

How high must all gas piping installed on top of roofs be elevated off the roof surface?

• A. 2 inches
• B. 3 inches
• C. 3.5 inches
• D. 4 inches

Answer: (C)

The correct elevation for gas piping installed on top of roofs is 3.5 inches off the roof surface. This specification is important because it helps prevent moisture and debris from accumulating around the piping, which can lead to corrosion and other detrimental effects that may compromise the integrity and safety of the gas system. Elevating the piping to this height ensures that water runoff does not create a potential hazard or interfere with the functionality of the system. While other elevation options may seem reasonable, they do not meet the safety and industry standards necessary to mitigate risks associated with gas piping installations.

The correct elevation for gas piping installed on top of roofs is 3.5 inches off the roof surface. This specification is important because it helps prevent moisture and debris from accumulating around the piping, which can lead to corrosion and other detrimental effects that may compromise the integrity and safety of the gas system. Elevating the piping to this height ensures that water runoff does not create a potential hazard or interfere with the functionality of the system.

While other elevation options may seem reasonable, they do not meet the safety and industry standards necessary to mitigate risks associated with gas piping installations.