A landlord has raised concerns about recent changes to gas safety testing after an engineer warned that updated standards could result in some installations failing checks they would previously have passed.
The engineer reportedly explained that the permitted pressure loss during gas tightness testing had been reduced, leaving him worried about having to fail systems that had previously met the requirements. He also anticipated difficult conversations with landlords and tenants if properties failed their inspections.
The landlord questioned how engineers would identify very small gas leaks, particularly in high-rise buildings, and expressed concern that some cases could lead to a switch to electric heating and cooking. Fortunately, the property in question passed its inspection.
What Has Changed in Gas Tightness Testing?
Gas tightness testing standards changed on 1 October 2026 with the introduction of IGEM/UP/1B Edition 4.
However, the idea that the changes represent a blanket reduction in permitted gas pressure loss is misleading. The allowable pressure drop now depends on factors including the installation’s volume and the type of gas used, rather than relying solely on the meter size.
Pipework must first be demonstrated to be gas tight before any allowance relating to existing appliances can be considered.
If an installation is found to be unsafe, the engineer must take appropriate action to make it safe. This could involve disconnecting an affected appliance or isolating the gas supply where necessary.
Importantly, a failed gas safety check does not automatically mean the entire property must be disconnected from the gas supply. The action required will depend on the nature of the problem and the safety risks identified.
Landlords should ensure that gas safety checks are carried out by appropriately qualified Gas Safe registered engineers and seek clarification if they are unsure how the updated testing requirements affect their properties.
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