Mobile Catering Gas Setups: What You Actually Need to Be Legal in 2026

Running a food truck, trailer, or mobile catering unit in 2026 isn’t just about great food — it’s about safety, compliance, and meeting strict gas regulations.

We regularly see setups across the Wirral and the North West that look fine on the surface but are not legally compliant. This guide breaks down exactly what you need to operate safely and legally.

Gas Safe Engineer (Legal Requirement)

Any gas work carried out on a mobile catering unit must be done by a qualified engineer registered with the Gas Safe Register.

What this means:

• Your installer must be Gas Safe registered

• They must be qualified for LPG and commercial catering

• DIY or unqualified work is illegal

Not all Gas Safe engineers are qualified for catering — this is a specialist category.

CP42 Gas Safety Certificate (Mandatory for Commercial Catering)

If you’re operating a food business, you are legally required to have a valid CP42 Gas Safety Certificate.

What it covers:

• All gas appliances (grills, fryers, ovens, etc.)

• Pipework and connections

• Ventilation

• Safety devices

Key points:

• Must be renewed annually

• Often required by:

  • Local councils

  • Event organisers

  • Insurance providers

No CP42 = you may not be allowed to trade.

LPG Gas Supply Setup (Correct Cylinder Installation)

Most mobile catering units run on LPG (propane).

A compliant setup should include:

• Securely mounted gas cylinders

• Proper regulators matched to appliances

• Correct pipework (usually copper or approved hose)

• Accessible isolation valves

Important:

Your gas system must be:

• Properly sized for demand

• Installed to current standards

• Tested for tightness

Gas Locker Requirements (One of the Most Common Failures)

Your gas bottles must be stored in a sealed, ventilated gas locker.

Legal requirements:

• Sealed from the interior of the vehicle

• Drop-out vents at low level

• Secure mounting for cylinders

• No electrical equipment inside

Why this matters:

LPG is heavier than air — leaks will sink and collect, creating a serious explosion risk if not ventilated correctly.

Gas Interlock System (Critical for Safety & Often Required)

A gas interlock system is a key safety device that shuts off gas if ventilation fails.

You will typically need:

• A ventilation canopy with extraction

• An interlock linked to airflow

What it does:

• Prevents gas flow unless ventilation is working

• Reduces risk of carbon monoxide build-up

Many commercial kitchens require this — and it’s increasingly expected in mobile setups too.

Ventilation Requirements

Proper ventilation is essential for both safety and compliance.

You must have:

• Adequate airflow for combustion

• Extraction systems where required

• No blocked vents

Why it matters:

Poor ventilation can lead to:

• Carbon monoxide build-up

• Failed gas safety checks

• Unsafe working conditions

Emergency Isolation Valve

Every setup must include a clearly accessible emergency shut-off valve.

Requirements:

• Easy to reach in an emergency

• Clearly labelled

• Positioned correctly within the system

This allows gas to be shut off instantly if something goes wrong.

Flame Failure Devices (FFD)

All catering appliances must have flame failure protection.

What this means:

If a flame goes out, the gas supply automatically shuts off.

Why it’s critical:

Prevents unburnt gas from leaking into your unit — a major explosion risk.

Pipework & Connections (Not All Materials Are Allowed)

We often see incorrect pipework used in mobile catering units.

A compliant system should use:

• Copper pipework where required

• Approved flexible hoses (correct type and length)

• Properly secured connections

Everything must be:

• Properly supported

• Protected from damage

• Installed to current standards

Documentation You Must Have

To be legally compliant and ready for inspections, you should have:

• CP42 Gas Safety Certificate

• Appliance records

• Installation documentation (where applicable)

These may be requested by:

• Environmental health officers

• Event organisers

• Insurance companies

Common Reasons Mobile Catering Setups Fail

From our experience working across the Wirral, the most common issues are:

• No valid CP42 certificate

• Incorrect gas locker setup

• Poor ventilation

• No interlock system

• Unsafe or DIY pipework

Why Compliance Matters

Getting your gas setup right isn’t just about ticking boxes.

It protects:

• Your business

• Your staff

• Your customers

And ensures you can:

• Trade legally

• Pass inspections

• Get insured

Our Advice:

If you're unsure whether your setup is compliant, the safest approach is to have it professionally checked.

A proper inspection will quickly highlight:

• Any risks

• Any legal issues

• What needs upgrading

Learn more about what we offer on our mobile catering page

Or give us a call/WhatsApp us at 0345 548 4080