UK commercial gas preparation guide
Use the checklist to define the inspection—not to replace the competent engineer
A useful commercial gas checklist starts with the premises, fuel, supply and every appliance. It then separates customer preparation, engineer competence, technical inspection, findings and follow-up so that no equipment disappears behind a generic certificate title.
Before using the checklist
Identify four boundaries before naming the certificate
Where and how is gas used?
Describe workplace, catering, industrial, mobile, residential, guest or sleeping uses and who owns, controls, maintains and operates the installation.
Natural gas, LPG or both?
Declare the meter, bulk tank or cylinders, regulators, pipework, isolation and any supply changes. The engineer needs the correct fuel categories.
What belongs in the scope?
List every appliance plus pipework, flues, chimneys, ventilation, extraction, make-up air, interlocks, controls and safety devices relevant to the installation.
Inspection, service, repair or record?
State the work requested and the document wording used by the client, insurer, landlord, managing agent, local authority or other recipient.
Why the former checklist was replaced
The previous version applied an annual certificate to every commercial appliance, treated CP42 as generic, made a universal carbon-monoxide alarm claim and used scare language about insurance and closure. The revised checklist is equipment- and duty-specific.
Choose the correct checklist route
Different installations need different records and work categories
| Installation | Starting record or service route | Extra checklist items | Do not assume |
|---|---|---|---|
| Commercial boiler, heater or plant | Commercial inspection, service or maintenance record matched to the plant. | Fuel, rating/input, flues, ventilation, controls, interlocks, pipework and areas served. | That one generic commercial category covers every boiler or item of plant. |
| Fixed commercial catering kitchen | Commercial catering inspection and commonly requested CP42-style record. | Every appliance, connection, restraint, extraction, make-up air, ventilation, flame safety and gas interlock. | That CP42 covers unrelated plant, accommodation or mobile units. |
| Mobile food truck, trailer, stall or bar | Mobile catering LPG inspection and CP44-style route where appropriate. | Cylinders, regulators, hoses, restraints, ventilation, every appliance, movement and declared unit use. | That a fixed-kitchen record covers mobile equipment. |
| Rented residential or guest accommodation | Landlord Gas Safety Record for relevant appliances and flues. | Appliance ownership, areas served, tenant or guest use, flues, records and separate workplace equipment. | That a commercial building label removes accommodation duties. |
| Commercial LPG premises | Commercial LPG inspection matched to appliances and supply categories. | Tank or cylinders, storage, regulators, service pipework, isolation, appliance list and buried pipe concerns. | That an appliance record covers the complete LPG installation. |
| Factory, agricultural or specialist industrial plant | Competence and evidence scope defined from the site, process and applicable duties. | Exact process, plant, pressure systems, supply, risk controls, standards and specialist competence. | That rules for shops or restaurants can simply be copied. |
Engineer verification
Check the business, person, fuel and appliance categories
Verify the provider
Use the Gas Safe Register or HSE check route where the work is within that scheme. Confirm that the business accepting the job matches the registration.
Check the person attending
The front of the ID card shows the engineer, registration number and expiry. Confirm the person who arrives is the person identified.
Read the reverse of the card
Check natural gas or LPG plus the exact boiler, catering, pipework or other categories needed. Registration does not grant every category.
Describe industrial work accurately
HSE identifies different competence routes for factories, mines, quarries, agricultural premises and certain other sites. Do not disguise specialist plant as an ordinary shop.
Pre-booking checklist
Send this information before asking for a certificate
- Premises: postcode, business type, every use of the site and whether anyone lives, sleeps or stays as a guest.
- Responsible parties: landlord, tenant, employer, operator, managing agent, maintenance contractor and who controls access.
- Fuel and supply: natural gas, LPG or both; meter, tank or cylinders; regulators, pipework, isolation and supplier where relevant.
- Appliance schedule: every boiler, water heater, cooker, oven, fryer, grill, heater, laundry appliance or item of plant.
- Identification: location, manufacturer, model, rating/input, areas served and readable data-plate photos for each appliance.
- Flues and ventilation: flue or chimney arrangements, fixed vents, mechanical extraction, make-up air and known obstructions.
- Catering safety systems: flexible connections, restraints, flame supervision, extraction and gas-supply interlock details.
- LPG installation: cylinder storage or bulk tank, regulators, vapour pipework, known buried sections and changes to the supply.
- History: previous records, services, defects, warning notices, isolation, repairs, alterations and unresolved recommendations.
- Required outcome: exact document requested, recipient, deadline and whether inspection, service, repair or commissioning is needed.
- Access: trading hours, shutdown window, parking, permits, loading, keys, escorts, security and the responsible site contact.
Agree the inspection scope
The competent person determines the technical checks required
| Scope area | Information to make available | What the final record should clarify |
|---|---|---|
| Appliances and plant | Asset list, data plates, location, operating information, manuals, previous service and known faults. | Which items were inspected, results, defects, limitations and safety action. |
| Natural-gas supply and installation pipework | Meter, isolation, accessible route, previous test information, damage, alterations and responsibility boundary. | What pipework checks formed part of the agreed visit and what remains a separate maintenance task. |
| LPG supply and service pipework | Tank or cylinders, supplier, storage, regulators, isolation, pipe route, materials, burial and inspection history. | Which supply components were examined and which owner, supplier or specialist actions remain. |
| Flues, chimneys and combustion | Flue route, terminations, shared systems, access, known damage and previous combustion or spillage concerns. | Checks completed, inaccessible sections, measurements, defects and remedial requirements. |
| Ventilation and catering extraction | Fixed vents, mechanical extraction, make-up air, interlock, recent alterations and operating arrangements. | Conditions tested, interlock or ventilation findings, limitations and required action. |
| Controls and safety devices | Emergency isolation, flame supervision, interlocks, alarms where required or installed and operator procedures. | Devices included, functional results, defects and any equipment left off or isolated. |
| Records and recipient requirements | Previous document, client wording, insurer or agent request, appliance schedule and applicable duty. | The record name, site, fuel, scope, date, engineer details and distribution or retention action. |
Operator observations between inspections
Report concerns—do not turn observation into unqualified gas work
Record and report
Report damaged casing, pipework, flues, connectors, hoses, regulators, ventilation grilles, restraints or controls. Do not dismantle or reconnect equipment.
Stop and escalate where unsafe
Unusual noise, smell, repeated shutdown, alarm activation, soot, scorching or unstable operation needs competent attention. Do not rely on an internet checklist to diagnose it.
Keep designed openings unobstructed
Do not block fixed air inlets, flues, chimneys or designed extraction. Changes to ventilation or kitchen layouts should be assessed rather than improvised.
Follow the site-specific plan
Where alarms are required or installed, follow the correct testing, maintenance and response arrangements. An alarm never replaces safe equipment or emergency action.
Suspected gas escape
Do not continue through the checklist. Turn off the supply if safe, follow the emergency route below and do not turn it back on until the issue has been dealt with by a competent person.
Completed-record checklist
Check that the document matches the inspection you ordered
Correct premises, fuel and areas
Confirm the address, responsible party, natural gas or LPG, inspected areas, supply boundary and requested record.
Every agreed appliance listed
Check location, identifying details and result for each asset. An omitted appliance is not covered by the certificate heading.
Results, defects and limitations
Review safety actions, measurements where relevant, inaccessible items, isolation, warning notices and recommended remedial work.
Business, person and date
Check registered business and engineer details, signature, inspection date and that the relevant work categories were matched before attendance.
Repair, reinspection or maintenance
Record who will complete remedial work, whether equipment remains unused and whether another visit or updated evidence is required.
Give the record to the right recipient
Follow the applicable landlord, workplace, client or contractual requirements rather than filing the document without action.
Inspection and maintenance timing
One annual-certificate rule does not fit every commercial asset
| Situation | Timing starting point | Checklist review trigger |
|---|---|---|
| Relevant landlord appliance or flue | Annual check under the landlord duties where the fitting serves relevant rented residential or guest accommodation. | Tenant, appliance, flue, access, ownership or accommodation change. |
| Commercial catering equipment | HSE says intervals vary, with annual inspection a reasonable general minimum. | Equipment, manufacturer guidance, intensity of use, layout, extraction or interlock change. |
| Workplace-only boiler or plant | Suitable planned maintenance based on duties, risk, use, condition, manufacturer guidance and standards. | Fault, repair, alteration, new equipment, changed use or previous finding. |
| LPG service pipework | Regular inspection and maintenance with the next interval set by a competent person. | Damage, corrosion, groundworks, route uncertainty, regulator or supply change. |
LPG checklist routes
Match the checklist to the fixed, landlord or mobile installation
Commercial LPG gas certificate
For declared LPG appliances, tank or cylinders, regulators, pipework and the commercial premises scope.
LPG landlord certificate
For relevant LPG appliances and flues provided for tenants, with ownership, areas served and supply details checked first.
Food truck, trailer or mobile unit
For the complete mobile installation, including every appliance, cylinders, regulators, hoses, restraints and ventilation.
UK LPG certificate hub
Choose catering, caravan, landlord, boiler, plant or appliance support before sending the inspection brief.
Service areas
Regular commercial gas enquiries across London, Essex and Kent
Regular work covers London, Essex and Kent. Enquiries in Hertfordshire, Surrey, Buckinghamshire, Berkshire and Sussex can also be considered when the right trade is available. Other UK areas are considered by request, subject to the premises, fuel, appliance list, engineer categories, travel and appointment requirements.
Possible gas escape
Stop the checklist and use the emergency route
HSE says that if a leak is suspected, turn off the supply if safe and immediately call 0800 111 999 for natural gas or the LPG supplier for liquefied petroleum gas. Do not turn the supply back on until the leak has been dealt with by a competent person. Evacuate and call 999 where there is fire, immediate danger or doubt.
Related commercial guides
Move from checklist to the correct inspection
How to get a commercial gas certificate
Follow the full path from premises and appliance scope to engineer verification, quote and completed record.
How long is the record valid?
Separate annual landlord checks, catering guidance, workplace maintenance and LPG inspection schedules.
Which gas certificate applies?
Identify workplace-only equipment, residential or guest accommodation, catering, plant and LPG duties.
Commercial catering gas certificate
Book a catering-specific scope for cooking appliances, pipework, ventilation, extraction and interlocks.
Primary UK sources
Build the checklist from current official guidance
HSE: Gas Safe ID cardsThe engineer identity and expiry on the front and work categories on the reverse.
HSE: catering maintenance and inspectionSafe equipment, competent contractors, inspection frequency and kitchen ventilation.
HSE CAIS23: catering gas safetyIndustry guidance for the use and maintenance of gas-fired catering equipment.
HSE: installation pipework maintenanceWhy pipework maintenance is distinct from the landlord annual appliance and flue check.
HSE: LPG service pipeworkOwnership, route, materials, pressure, inspection, maintenance and replacement considerations.
Checklist questions
Commercial gas appliance checklist FAQs
What should be on a commercial gas appliance certification checklist?
Does every commercial appliance need the same certificate?
Who can complete the technical commercial gas checks?
Can business staff complete the appliance inspection themselves?
Should pipework be included in the checklist?
What catering-specific items should be declared?
Are carbon-monoxide alarms mandatory beside every commercial gas appliance?
What happens when an appliance fails the inspection?
How often should the checklist be reviewed?
What should I send Upkeepone before booking?
Ready to scope the inspection?
Send the premises, fuel, supply and complete appliance list
Upkeepone can check the natural-gas or LPG scope, engineer categories, access, required evidence, service area and quotation before confirming attendance. A satisfactory record, repair cost or date cannot be promised until the details and findings are known.
Possible gas escapes must follow the emergency route above.
