Leak on Gas Supply Finding leaks on a gas supply whether domestic or commercial is difficult, it becomes even harder when the gas pipe is installed in voids or buried in concrete. leak on gas supply In the first instance, get National Grid, formally known as Transco or a registered Gas Safe engineer to carry out a tightness (also called a soundness test) test on the gas supply - this will show if there is a leak on the gas supply pipe past the meter. How Leakbusters find locate the leak ZECT® Leak Tracer Agent® is manufactured exclusively for Leakbusters limited Trademark registered at UK Patent Office and is owned by Leakbusters limited Leakbusters engineers are all fully qualified Gas Safe registered and qualified. We disconnect the gas meter, then we inject ZECT® Leak Tracer Agent® into the gas supply pipe. The gas supply pipe is then purged and we test all outlets to ensure the ZECT® Leak Tracer Agent® has passed through the gas pipe and has filled up the pipe. We use specialist tracing technology to then locate the ZECT® which will rise straight up from the leaking point. ZECT® will rise up through virtually anything including concrete.