If your gas system passed a safety check last year but has failed now, it can feel confusing and frustrating. From a landlord’s point of view, nothing has changed — yet the system is suddenly considered unsafe.
If you suspect a gas leak, call 0800 111 999 first. The Leak Hunter works on confirmed gas leaks after the supply has been turned off or isolated.
Why this situation is more common than you think
This is something landlords are increasingly experiencing. A system that appeared fine previously can fail a later test, even with no obvious signs of a problem.
The key point is that a pass result in the past does not guarantee the system will continue to pass in the future.
What has actually changed?
In most cases, one of two things has happened:
- A small leak has developed over time
- A previously undetected issue is now being picked up during testing
Gas pipework can deteriorate gradually, especially at joints or older sections. These changes are not always noticeable in day-to-day use.
This is why a system can appear fine but still fail when properly tested.
Does this mean the whole system has failed?
No — and this is where many landlords go wrong.
A failed test confirms there is a leak somewhere, but it does not mean the entire pipe system needs to be replaced. In many cases, the issue is localised.
This is why Can a Gas Leak Be Repaired Without Replacing Pipes is an important part of the decision process.
Why this often leads to unnecessary replacement
When a system suddenly fails, there is pressure to fix it quickly. Without knowing where the leak is, a full pipe re-run can seem like the safest option.
This is where landlords often end up committing to work that may not actually be needed.
The reality is that without proper diagnosis, the decision is based on uncertainty rather than evidence.
What landlords should do next
- Confirm the gas supply has been safely isolated
- Avoid assuming the whole system has failed
- Arrange for the leak to be traced accurately
- Assess repair options based on confirmed findings
This approach allows you to make a clear and informed decision rather than reacting to the failure itself.
How leak tracing changes the situation
Once the leak is located, the problem becomes much more manageable. Instead of treating the system as a whole, you can focus on the exact point of failure.
This is where How We Trace Gas Leaks After Isolation becomes essential.
It provides clarity on what has changed and what actually needs to be repaired.
What this means for tenants
From a tenant’s perspective, the situation often feels sudden. One day everything is working, the next the gas is off.
Clear communication and a structured plan help reduce uncertainty while the issue is being resolved.
Once the leak is identified, timelines become much clearer.
How The Leak Hunter can help
The Leak Hunter specialises in tracing and repairing gas leaks after isolation. We identify the source of the issue and provide a clear repair solution wherever possible, helping avoid unnecessary full pipe replacement.
Learn more about our service here: Gas Leak Detection.
Frequently asked questions
Why would a system pass one year and fail the next?
Small leaks can develop over time, and testing can reveal issues that were not previously detected.
Does a failed test mean the pipework is old or damaged?
Not always. The issue may be localised rather than affecting the entire system.
Do you only cover my area?
If you’re outside these areas, don’t worry — our team covers most of the South East, providing trusted leak detection services throughout London, Kent, Sussex, and Surrey.
If your gas system has passed before but failed now, the most important step is to understand why. In many cases, the issue is smaller and more manageable than it first appears.
Find out more about Gas Leak Detection.