Emergency Gas Appliance Isolation

What emergency gas appliance isolation covers

If a gas appliance is suspected to be unsafe, isolation reduces risk straight away and helps you take the right next step.

• Attendance for urgent, safety-led assessment
• Isolation of a single appliance (or the gas supply, if required)
• Making the situation safe, such as capping off and labelling
• Clear explanation of what has been found and what it means
• Practical options for repair or replacement and restoring service where possible
• Work carried out in line with Gas Safe requirements

When this service is most needed

You may need emergency isolation if you have a suspected gas leak, fumes, soot marks around an appliance, pilot light issues, repeated boiler lockouts, or a warning from a carbon monoxide alarm. It is also relevant after damage to pipework, a failed safety check, or if an appliance has been identified as Immediately Dangerous or At Risk.

If you can smell gas, treat it as an emergency. Call the National Gas Emergency Service on 0800 111 999 first, then arrange isolation and repairs once the immediate emergency is under control.

What happens during the visit

The engineer will identify the appliance and connections involved, carry out appropriate safety checks, and confirm the safest action. If the appliance cannot be left in service, it will be isolated to prevent use, and you will be told what has been done and why.

Where practical and safe, you will also be advised on what can be restored during the visit, and what work needs booking in to return the system to normal.

After the appliance is made safe

You will receive clear next steps, which may include repair, replacement, or further investigation. For landlords and commercial clients, isolation can support compliance by ensuring unsafe appliances are not left in use until properly rectified.