Is a Gas Interlock System a Legal Requirement?
When installing or upgrading gas appliances in a commercial kitchen, one of the most common questions we hear is: “Is a gas interlock system a legal requirement?” The short answer is yes – in commercial catering environments, a gas interlock system is required by law.
But to understand why, and what your responsibilities are, let’s break it down.
What Is a Gas Interlock System?
A gas interlock system is a safety device that automatically cuts off the gas supply if there is a problem with ventilation or extraction in a commercial kitchen. It is designed to:
- Prevent gas leaks and accumulation of dangerous fumes
- Ensure proper airflow through extraction and input fans
- Comply with modern building and safety regulations
In essence, if the extraction system fails, the gas supply is shut off to prevent carbon monoxide build-up or other serious hazards.
Is It a Legal Requirement in the UK?
Yes – in most commercial kitchens, gas interlock systems are required under UK law and industry guidelines. The key regulations include:
1. BS 6173: 2009
This British Standard applies to the installation and maintenance of gas-fired catering appliances. It states clearly that a gas interlock system is mandatory in commercial kitchens where mechanical extraction systems are installed.
2. Gas Safe Register & Building Regulations
Gas engineers working on commercial kitchens must follow Gas Safe regulations, which are informed by standards like BS 6173. Non-compliance can result in enforcement action, fines, or invalidated insurance.
3. HSE Guidance (HSE Catering Sheet 23)
The Health and Safety Executive also advises that gas interlock systems are essential for the safe operation of gas appliances in commercial kitchens.
Does Every Kitchen Need One?
If your kitchen uses:
- Commercial gas appliances…
…then yes, a gas interlock system is required.
This applies to:
- Restaurants
- Schools
- Pubs
- Hotels
- Cafés
- Canteens
- Any other professional catering environments
Even if you’re refurbishing an older kitchen, you’ll need to bring it up to current safety standards – and that includes installing an interlock system.
Why Is Compliance Important?
Installing a gas interlock system is not just about ticking boxes:
- It protects your staff and customers from potentially lethal gas-related hazards
- It ensures your kitchen passes inspection
- It’s often required to validate your insurance cover
Failure to comply with gas safety laws could result in kitchen closure, legal action, or worse – serious injury.
How Can You Tell If Your System Is Compliant?
If you’re unsure whether your kitchen is up to code:
- Contact a Gas Safe registered engineer to inspect your system
- Check your kitchen’s ventilation and gas interlock documentation
- Ask your installer if the system was installed to BS 6173: 2009 standards
Need a Gas Interlock System or Spare Parts?
At FES Food Service Equipment Spares, we stock a wide range of gas interlock systems and replacement components to help keep your kitchen compliant and safe. We also offer expert advice to ensure you’re choosing the correct parts.
Browse our catering spares or Contact Our Team for help identifying what you need.
So, is a gas interlock system a legal requirement?
Yes – if you operate a commercial kitchen with gas appliances and mechanical extraction (for more information check out DW172), you must have a compliant gas interlock system in place.
Don’t risk the safety of your team or the legality of your kitchen – stay compliant, stay safe, and ensure your equipment meets all current UK regulations.