Monthly Archives: July 2025

Hopefully after last month’s newsletter you thought about your process regarding pressure testing new systems. This month we are moving into Leak Testing. Again, any code references will be from the 2024 versions of NFPA 54/58.

When are leak tests required? The official NFPA code in both 54 (8.2.3) & 58 (6.18.2) states, “Immediately after the gas is turned on into a new system or into a system that has been initially restored after an interruption of service, the piping system shall be checked for leakage.” I’ve heard several arguments about what qualifies as an “Interruption of Service”. The official NFPA definition for that in NFPA 54 - 3.3.61 defines an Interruption of Service as a, “disconnection or discontinuation of fuel gas to the point of delivery.” Some examples would be an out of gas situation or a tank that was disconnected due to non-payment or some other reason.