What should be done with gas piping that is no longer used in a system?

What should be done with gas piping that is no longer used in a system?

• A. It should be left in place but capped at the end.
• B. It should be left in place unmodified.
• C. It should be repurposed for another fuel.
• D. It should be removed or properly terminated per code, not simply left in place.

Answer: (D)

Unused gas piping creates a dead leg that can harbor gas, corrode, or leak over time and even become a hidden ignition path. To keep the system safe, it must be removed or terminated in a way that complies with the gas code. Proper termination means isolating the line from the live system and either removing the piping or capping and sealing the end with listed fittings, followed by a leak test to ensure there are no remaining leaks. Simply leaving the piping in place or repurposing it for another fuel does not eliminate the hazard or meet code requirements.

Unused gas piping creates a dead leg that can harbor gas, corrode, or leak over time and even become a hidden ignition path. To keep the system safe, it must be removed or terminated in a way that complies with the gas code. Proper termination means isolating the line from the live system and either removing the piping or capping and sealing the end with listed fittings, followed by a leak test to ensure there are no remaining leaks. Simply leaving the piping in place or repurposing it for another fuel does not eliminate the hazard or meet code requirements.