What is a commercial gas safety record (CP17)?

A CP17 is the Non-Domestic Gas Installation Safety Report, the commercial equivalent of the domestic CP12. Commercial and other non-domestic premises with gas appliances, from shops and offices to restaurants, must have an annual gas safety inspection, just as a rented home does. The form is different, the competencies are different, and the installations are usually a good deal bigger.

Which commercial premises need a CP17?

Any non-domestic premises with a gas installation: shops, offices, restaurants and commercial kitchens, warehouses, workshops, schools, village halls, care settings, plant rooms serving larger buildings. The legal footing is broader than the landlord duty at home. The Gas Safety (Installation and Use) Regulations 1998 require gas appliances and installations to be maintained in a safe condition wherever they are, and employers carry general duties for the safety of their workplaces on top. An annual inspection recorded on a CP17 is how a business demonstrates both. Insurers and licensing bodies ask for it too, often before the law does.

What does a CP17 inspection cover?

• Every gas appliance on the installation: its operation, combustion performance, safety devices and physical condition.
• The pipework, including tightness testing appropriate to the size of the installation.
• Flues and chimneys: route, condition, termination and performance.
• Ventilation to appliances and plant rooms, checked against what the installation needs.
• An overall classification: the installation is recorded as satisfactory, or the defects found are listed with the action needed.
• Confirmation the installation complies with the Gas Safety (Installation and Use) Regulations 1998 and the relevant British Standards.

Who can issue a CP17?

A Gas Safe registered engineer who holds the relevant commercial, or non-domestic, competencies, not just domestic ones. This is the detail that catches businesses out. Gas Safe registration works by category, and a first-rate domestic engineer is simply not registered for commercial pipework or plant. Commercial catering appliances carry their own categories again, so the right engineer for an office boiler may not be the right engineer for the kitchen line beneath it. Every registered engineer carries an ID card listing their qualifications, and the Gas Safe Register's find-an-engineer search filters by work type. Check before booking; it saves a wasted visit and a report that would not be valid anyway.

How does a CP17 differ from a domestic CP12?

The principle is identical: an annual, recorded inspection of the whole gas installation by someone qualified for it. The differences are scale and audience. Commercial pipework runs larger and longer, so tightness testing follows the commercial IGEM procedures rather than the domestic one, and purging and isolation on a big installation are engineered jobs in their own right. The report is addressed to a business rather than a landlord and tenant, and the people asking to see it are insurers, environmental health officers, licensing authorities and head office rather than a letting agent. A CP17 is also commonly a condition of the premises' insurance staying valid, which concentrates minds better than most regulations do.

What happens if defects are found?

The report lists them with a classification under the industry's unsafe situations procedure, and anything immediately dangerous will be disconnected with the responsible person's agreement and a warning notice attached. The business then has a straightforward path: get the remedial work done by an appropriately qualified Gas Safe registered engineer, keep the paperwork, and have the installation signed back into service. What a business should not do is quietly reconnect an appliance an engineer has turned off. That decision was made about the safety of staff and the public, and it is recorded.

How do businesses keep the annual cycle on track?

The same way good landlords do: work from the next-due date, and let something chase it that is not a person's memory. A CP17 that lapses tends to be discovered by an insurer's renewal questionnaire or an EHO visit, which is the expensive way. Engineers who look after commercial clients use Manifold to track each site's renewal and keep every report stored against the premises, so the reminder goes out before the date rather than after it, and last year's report is on screen at this year's visit.