The requirement for performing a leak check only applies to the portion of the piping covered by NFPA 54.

The requirement for performing a leak check only applies to the portion of the piping covered by NFPA 54.

• A. True
• B. Not specified
• C. Only interior piping
• D. False

Answer: (D)

Leaking checks are performed to verify the entire gas piping system for leaks after installation or modification. They aren’t limited to just the portion of piping that happens to fall under NFPA 54’s scope; NFPA 54 guides how to test and what parts to include, but any piping that was installed or altered needs to be tested from the supply source to the appliance. This ensures there are no leaks anywhere along the route, including exterior runs or segments outside the areas covered by NFPA 54. The test is done by pressurizing the system to the prescribed test pressure and applying a soapy solution to joints and connections to look for bubbles signaling a leak. If leaks are found, they’re repaired and the system is retested until no leaks are detected.

Leaking checks are performed to verify the entire gas piping system for leaks after installation or modification. They aren’t limited to just the portion of piping that happens to fall under NFPA 54’s scope; NFPA 54 guides how to test and what parts to include, but any piping that was installed or altered needs to be tested from the supply source to the appliance. This ensures there are no leaks anywhere along the route, including exterior runs or segments outside the areas covered by NFPA 54. The test is done by pressurizing the system to the prescribed test pressure and applying a soapy solution to joints and connections to look for bubbles signaling a leak. If leaks are found, they’re repaired and the system is retested until no leaks are detected.