Gas Interlock
System Installation
Safer kitchens. Compliant businesses. Total peace of mind.
We install, repair and upgrade gas interlock systems for commercial kitchens, restaurants, takeaways, hotels, schools and all catering facilities.
Gas Interlock
Installation
Gas Solenoid
Valves
Ventilation
Interlocks
CO₂ & Gas
Detection
CP42
Certification
Safer people
Brighter businesses
Brighter businesses
- Gas Safe Registered
- Commercial Gas Engineers
- London & South East
- Fast Response
Why Choose a Gas Interlock System?
A gas interlock system prevents gas being supplied to catering appliances unless the required ventilation and safety conditions are satisfied.
Meets legal requirements
Reduces risk
Keeps your business running
- Compliant
- Safe
- Reliable
- Peace of mind
How a Gas Interlock System Works
All parts work together to keep your kitchen safe.
Extraction Fan
Airflow Proving
Gas Interlock Controller
CO₂ Sensor
Gas Detector
Emergency Stop
Gas Solenoid Valve
Commercial Catering Appliances
Our Gas Interlock Services
Complete installation, repair and upgrade services.
Installation
New gas interlock systems for all commercial kitchens.
View Service →Solenoid Valves
Installation and replacement of gas shut-off valves.
View Service →Proving Systems
Gas proving and automatic valve control.
View Service →CO₂ Monitoring
CO₂ monitoring and alarm systems.
View Service →Detection Systems
Natural gas and LPG detection where applicable.
View Service →Fan Interlocks
Interface with mechanical ventilation.
View Service →
Gas won’t turn on?Gas Interlock System
Gas Interlock System
Not Working?
We diagnose and repair faults including:
- Gas valve won’t open
- Fan not proving
- Interlock panel fault
- CO₂ alarm or gas detector fault
- Emergency stop activated
- Electrical/control fault
Who We Install Systems For
Restaurants
Takeaways
Hotels
Pubs
Schools
Care Homes
Commercial Kitchens
Food Production
Complete safety package
Commercial Gas Interlock System
A professionally designed system that proves the kitchen extraction is running before allowing gas to reach the catering appliances.
Interlock controller
Clear system status, reset and emergency-stop control.
Fan proving
Airflow or pressure monitoring linked to the extraction system.
Gas solenoid valve
Automatic gas isolation when safe conditions are not proved.
Detection options
CO₂, natural gas and LPG monitoring where required.
- Site survey and system design
- Supply and installation
- Testing and commissioning
- Handover and certification
Need Your CP42 Commercial Catering Gas Safety Certificate Too?
Combine gas interlock works with inspection of your commercial gas installation and appliances.
About the CP42 certificate →Gas Safe Registered
Commercial Gas Engineers
London & South East
Commercial gas safety guidance
A complete approach to commercial kitchen gas interlock safety
A gas interlock system is a safety control arrangement that prevents gas from reaching commercial catering appliances unless the required ventilation and safety conditions are satisfied. It normally connects the extraction system, airflow or fan proving, interlock controller, emergency stop and automatic gas solenoid valve. Depending on the premises, it can also receive signals from carbon dioxide, carbon monoxide, natural gas or LPG detectors. If a required condition is lost, the controls close the valve and stop the gas supply rather than allowing appliances to continue operating unsafely.
What a professional installation covers
A reliable installation begins with the kitchen, not a pre-selected box. The engineer should establish the gas load, appliance arrangement, incoming pipe size, valve position, extraction controls and the method used to confirm airflow. Existing wiring, emergency stops and detector interfaces must also be checked. This survey determines whether the system needs simple fan interlocking, pressure proving, gas detection, or a combination of controls. It also helps avoid common problems such as an undersized valve, nuisance shutdowns, poor sensor positioning or a controller that cannot support the equipment already on site.
- Survey of appliances, pipework, ventilation and existing controls
- Correctly sized gas solenoid valve and control panel
- Fan or airflow proving appropriate to the extraction system
- Emergency stop, detector and sensor connections where required
- Functional testing, commissioning and a clear handover
- Advice on servicing, records and future maintenance
BS 6173, IGEM/UP/19 and CP42
Commercial catering gas work must be assessed against the actual installation and the standards that apply to it. BS 6173 addresses gas-fired catering appliances and the safety relationship between gas supply and mechanical ventilation. IGEM/UP/19 provides industry guidance for the design and application of interlock systems. A CP42 record relates to commercial catering gas safety inspection and should not be confused with the commissioning record for the interlock controls themselves. Our engineers consider the complete arrangement so the panel, valve, ventilation and appliances operate as one safety system.
Requirements vary between kitchens. Appliance type, ventilation design, room layout, fuel, occupancy and the age of the installation can all affect the correct solution. Online guidance is useful for understanding the system, but it cannot replace an inspection by a suitably qualified Gas Safe registered commercial engineer.
Read the gas interlock regulations guideRepairs and fault finding
When gas will not turn on, the fault may be the extraction fan, airflow switch, pressure tube, emergency stop, detector, controller, wiring or solenoid valve. We test the sequence safely instead of bypassing a safety device. Repeatedly resetting a panel without finding the cause can conceal an intermittent ventilation or control fault and should be avoided.
Start the interlock fault finderServicing and planned checks
Planned servicing helps identify damaged emergency stops, blocked pressure tubes, contaminated sensors, loose electrical connections and slow or sticking valves before they interrupt service. A visit should test shutdown functions and confirm that gas cannot remain available when a required safety condition is lost. Records also give operators a useful history of defects and remedial work.
View interlock servicingEmergency gas shutdown
If you smell gas, do not operate electrical switches, create a flame or attempt a repair. Turn off the supply only if it is safe and you know how, move people away, ventilate where safe, and call the National Gas Emergency Service on 0800 111 999. Once the immediate danger is controlled, we can investigate the commercial interlock or shut-off system and arrange the appropriate repair.
Call 020 8935 5572Kitchens, schools, care homes and plant rooms
We support restaurants, takeaways, pubs, hotels, production kitchens, schools, colleges, care homes and other managed catering sites. We also work with facilities teams where gas detection, proving and automatic shut-off are required in plant rooms or service areas. Each environment has different operating pressures: a restaurant may need a fast repair before service, while a school or care setting may require planned access, documentation and close coordination with site management.
Coverage includes London, Surrey and towns around the M25, with individual area guides showing the postcodes served. Same-day attendance may be available depending on the fault, location, access and parts required. Replacement interlock controls, air pressure switches, gas solenoid valves, catering hoses and universal thermocouples are commonly stocked, although an engineer must confirm compatibility and safe installation on site.
Check towns and postcodes coveredPlan your installation or repair
Tell us the postcode, business type, number of gas appliances and whether an extraction or interlock system is already installed. Photos of the panel, valve and kitchen layout can help us understand the job before attendance.