Gas cooker installation regulations: what the rules actually say

A free-standing gas cooker looks like an appliance you plug in, and the bayonet on the end of its hose encourages the idea. It is a gas installation, and it carries a specific set of requirements: who may do the work, how the appliance is held down, what it is connected with, whether the room needs a vent, how much space it needs around it, and what has to be proved before the engineer leaves. This guide sets out each of those, says where each one comes from, and shows what an engineer checks on a cooker that is already in.

What are the regulations for installing a gas cooker?

There is no single gas cooker regulation. The requirements come from three places that stack: the Gas Safety (Installation and Use) Regulations 1998, which say who may do the work and what must be examined afterwards; the installation standard BS 6172 together with Gas Safe Register's technical bulletins, which say how the appliance is connected and secured; and the manufacturer's installation instructions for the model in front of you, which govern clearances and anything specific to that appliance. Building regulations guidance adds the ventilation the room needs. Here is the whole set in one place.

Who is allowed to install a gas cooker?

A Gas Safe registered engineer whose registration covers cooking appliances. Regulation 3(1) of the Gas Safety (Installation and Use) Regulations 1998 puts it plainly: no person shall carry out any work in relation to a gas fitting unless he is competent to do so. Regulation 3(3) adds the registration requirement for anyone doing that work as a business, by requiring the employer or self-employed person to be a member of a class of persons approved by the Health and Safety Executive, which is what Gas Safe Register is. Regulation 3(7) makes it an offence to falsely pretend to be a member of that class, which is why the ID card is worth asking for. Registration is held by appliance category, so an engineer qualified on boilers is not automatically qualified on cookers: check the card, or look the business up on the register, before the work starts.

Gas Safe Register's Technical Bulletin 025 draws the line at the appliance itself. Where a gas cooker is installed for the first time or repositioned permanently, it is gas work within the meaning of the regulations and must be carried out by a registered engineer holding the appropriate proof of competence. Altering the installation pipework so the cooker can move permanently is gas work too. None of that changes because the cooker is second-hand, because it is the same cooker you had in the last house, or because the kitchen fitter is already on site.

What can you do yourself at the bayonet fitting?

Unplug the cooker at its self-sealing bayonet and plug the same cooker back into the same fitting, and nothing else. TB 025 is specific: temporary disconnection and reconnection at the same location, where the cooker is not being installed for the first time or repositioned permanently, is not deemed gas work and may be carried out by a non-registered person, for example when a home owner temporarily removes the cooker when cleaning. HSE's landlord guidance says the same thing from the other direction, that free-standing cookers connected by a flexible connector are not considered readily movable but can be moved temporarily to clean the space they normally occupy, and that any other type of installation or reinstallation is gas work.

Two practical points come with that. TB 025 notes that when the hose comes off the connector there will in most cases be a residual smell of gas, and strongly recommends using leak detection fluid or a gas detector to confirm nothing is escaping from the fitting, with a proprietary bayonet blanking cap available for added security. And a connection point that will never be used again should be sealed properly, with a screwed plug, cap or compression fitting in place of the bayonet, which is gas work and belongs to a registered engineer. Anyone doing this while at work, a kitchen fitter or a removal firm, still has to be competent enough that the act of doing it does not cause a gas escape.

Does a gas cooker need a stability bracket or chain?

A free-standing cooker connected by a flexible connector needs a stability device, and that is a bracket fixed to the floor or a chain fixed to the wall. The installation standard is BS 6172, Specification for installation, servicing and maintenance of domestic gas cooking appliances (2nd and 3rd family gases), currently BS 6172:2010+A1:2017. Its text is BSI copyright and is not reproduced here, but Gas Safe Register's TB 022 lists what the standard covers, and the use of stability devices is one of the six headings it names. The reason is the one you can picture: a hose does not hold a cooker down, and an oven door with a loaded roasting tin on it is a lever.

The fitting method comes from the appliance. Belling's installation instructions for its 60 cm gas cookers say that if the cooker is fitted with a flexible connection a stability bracket should be fitted to engage in the back of the cooker, and then give the method: mark a pencil line at the front edge of the cooker in position, mark the centre line, measure 450 mm back from that pencil line to locate the front edge of the lower bracket, fix it to the floor, measure from floor level to the engagement edge in the back of the cooker and add 3 mm, and assemble the top part of the bracket to that height. The manual also tells the engineer to look for the stability bracket location marked on the rear of the appliance and position the bracket accordingly. A chain kit does the same job on a wall where the floor will not take a fixing, and the point of the check is the same either way: the device has to be fixed to something solid and actually engaged with the appliance, not sitting behind it.

What hose and bayonet does a gas cooker need?

A flexible connector with a self-sealing plug-in device made to BS 669-1 or BS EN 14800, or rigid pipework. Gas Safe Register's TB 148 set out what BS 6172 required for a free-standing cooker and confirmed that hoses made to BS EN 14800 are acceptable, after BS 669-1 hoses for LPG stopped being produced; that amendment went into the standard in 2017 and the bulletin was withdrawn once it had. TB 036, which is current, describes the position for built-in hobs and ovens, which may also be connected with pliable corrugated stainless steel tube to BS 7838 or BS EN 15266, with the length of unsupported tube limited. Both bulletins carry the same warning about gas family: connectors made to BS 669-1 for natural gas are not generally suitable for LPG, LPG ones are typically marked with a red stripe along their length or a red band around the circumference, and hoses made to BS EN 14800 suit both.

Everything else about the connection is routing. Belling's manual asks for a 900 mm to 1125 mm length of flexible connector, positions the bayonet so the hose cannot kink, and says the connector must under no circumstances be allowed to touch the vertical oven flue tubes at the back of the appliance. Where a cooker is being reinstalled and nobody can find the instructions, TB 022 recommends the termination point be securely fixed to the fabric of the building immediately behind the appliance at a height of approximately 750 mm from floor level. A hose that is stretched tight, kinked behind a plinth, resting on hot metal, or long enough to loop into the floor void is the commonest thing an engineer finds wrong on an otherwise sound cooker.

Do gas cookers in flats need a flame supervision device?

The industry rule has been that a cooking appliance in a flat or other multi-occupancy building should have flame supervision on all its burners, and it is in an unusual state at the moment. A flame supervision device shuts the gas off at a burner when the flame goes out, which is what stops an unlit burner filling a home with gas after a pan boils over. The requirement was carried in Gas Safe Register's Technical Bulletin 015, published on 22 January 2013 and titled The requirement to install gas appliances (including cooking appliances) with flame supervision in flats and other multi-occupancy buildings.

That bulletin has been withdrawn. The Register's own index of technical bulletins, TB 000, Issue No 1 of 2025 dated 4 July 2025, records TB 015 as withdrawn on 15 July 2025. TB 022, which is current, still points engineers at it: its Note 1 reads, for guidance on the requirement to install gas appliances (including cooking appliances) with flame supervision on all burners in flats and other multi-dwelling buildings see Technical Bulletin (TB) 015. So a current bulletin cites a withdrawn one, and the wording moves between multi-occupancy and multi-dwelling, which leaves the boundary around a house in multiple occupation worth confirming rather than assuming. The safe reading on site has not changed: the appliance to put in a flat is one with flame supervision on every burner, and every device gets proved during the check. Where the scope for a particular property is the question, the answer is the Register's current technical information and its technical helpline, not a copy of a bulletin that has been pulled.

Does a gas cooker need ventilation?

It needs an openable window or its equivalent in every case, and a permanently open air vent as well if the room is 10 m³ or smaller. A gas cooker is a flueless appliance: its products of combustion mix with the room air and leave as stale air leaves, so ventilation is the whole safety case rather than a supporting act. Approved Document J, the statutory guidance for combustion appliances in England, gives the figures in Diagram 33, and because it is Crown copyright published under the Open Government Licence they can be reproduced here in full. Note what the rated heat input column says for cookers: not applicable. Unlike a water heater or a space heater, the vent is sized by room volume alone.

• Approved Document J's note 1 to the table: the permanent ventilation provisions listed are additional to the openable elements or, for kitchens only, extract ventilation in accordance with Approved Document F. The vent is not an alternative to the window.
• An internal space, in the table's headings, means one that communicates with several other rooms or spaces, such as a hallway or landing.
• Paragraph 3.16 catches the empty kitchen: a room containing a gas point intended for use with a flueless appliance, such as a gas point for a cooker, should have the ventilation provision required for the installation of that appliance. Leaving the bayonet in and taking the cooker out does not remove the requirement.
• Approved Document J is marked for use in England. Wales, Scotland and Northern Ireland publish their own building regulations guidance, and BS 5440-2 is where the sums are done when another fuel-burning appliance shares the room.
• Manufacturers publish the same numbers. Belling's 60 cm gas cooker instructions ask for a 100 cm² vent for room volumes up to 5 m³, 50 cm² between 5 m³ and 10 m³, and none where the room exceeds 10 m³ or has a door that opens directly to outside, and add that the appliance must not be installed in a bedsitting room of less than 20 m³, or in a bathroom or shower room.
• Contains public sector information licensed under the Open Government Licence v3.0.

What clearances does a gas cooker need?

The ones in that model's installation instructions, which is a real answer rather than a dodge, because the figures genuinely differ between appliances and the manufacturer's book is the document an engineer is required to work to. What makes the answer useful is seeing a real set, so here is one manufacturer's. Where the instructions cannot be found, TB 022 gives the route: ask the manufacturer whether they are still available and what the specific requirements are, and only if the manufacturer no longer exists or cannot identify them is it acceptable to install to the methods in the current BS 6172, whose clearance figures TB 022 carries in its own diagrams.

Clearances are also the requirement most often destroyed after the installation, by work nobody thought of as gas work. TB 025 makes the point directly: where kitchen cabinets are replaced but the existing cooker and its position are retained, the new cabinets either side of and above the cooker still have to comply with the cooker manufacturer's installation instructions or the current BS 6172. A new worktop, a taller wall unit, a laminate floor that raises the cooker, an extractor fitted lower than the last one, any of those can put a compliant installation outside its figures without anyone touching a gas fitting.

What does the engineer check on an existing gas cooker?

Regulation 26(9) sets the floor and the appliance adds the rest. Immediately after working on a gas appliance the engineer must examine the effectiveness of any flue, the supply of combustion air, the operating pressure or heat input or, where examining that is not reasonably practicable, the combustion performance, and the operation of the appliance so as to ensure its safe functioning. A cooker has no flue, so combustion air means the ventilation above. Here is the run in the order it is usually done.

Can you install a second-hand gas cooker?

Only where the appliance installation instructions are available, and TB 022 is the bulletin that says so. It splits the question in two using BS 6172's definitions. A previously used appliance is one that stays within the ownership of the gas user but may be relocated within an existing kitchen or moved from one property to another during a house move. A second-hand appliance is one obtained in a used or refurbished state and installed for that particular gas user for the first time. The distinction matters because the two get different answers.

• Previously used, instructions available: install to the appliance instructions as normal.
• Previously used, instructions missing: consult the appliance manufacturer to find out whether they are still available and what the specific requirements are. The things you cannot guess are the minimum distances from combustible materials and where the termination point goes.
• Previously used, manufacturer gone or unable to identify the requirements: TB 022 says it is then acceptable to install to the methods in the current BS 6172, which covers design and planning, installation, location, siting and clearance requirements, ventilation, gas connections and the use of stability devices.
• Second-hand, instructions available: install to them.
• Second-hand, instructions not available: TB 022's decision flowchart is unambiguous. The appliance must not be fitted until a copy of the appliance installation instructions is available.
• TB 022 also notes that the appliance supply regulations it cites require the seller to provide the purchaser with a copy of the installation instructions with the appliance, which is worth knowing before money changes hands on a marketplace listing.

What are the landlord's duties for a gas cooker?

If the landlord provided the cooker it is a relevant gas fitting under regulation 36, so it is maintained in a safe condition and it gets its own line and verdict on the annual gas safety record. If the tenant owns it, the appliance falls outside those duties but the installation pipework serving it does not. Gas Safe Register's TB 055, Duties of a landlord, states it in a sentence: the definition of a relevant gas fitting set out in regulation 36 excludes a tenant's own gas appliance, such as a gas cooker, but it covers the installation pipework supplying the gas appliance. HSE's landlord guidance says the same and recommends going further, by asking the engineer to test the whole system for tightness and visually examine the pipework as far as is reasonably practicable at the annual visit.

The trap is the change of tenancy. TB 055 is explicit that where a tenant moves out and leaves gas appliances in situ, those appliances are adopted by the landlord and fall under the landlord's regulation 36 duties for the next tenant. HSE puts the same duty in practical terms: when tenants vacate they may have removed appliances unsafely or left their own in place, so landlords should clarify appliance ownership before re-letting, carry out appropriate checks, and have any unsafe equipment rectified or removed before a new tenancy begins. A cooker that was nobody's responsibility in June can be entirely the landlord's in July, with no paperwork having changed hands. On the alarm question, England's carbon monoxide alarm requirement, in force since 1 October 2022, applies to rooms with a fixed combustion appliance and excludes gas cookers, so a kitchen whose only gas appliance is the cooker does not trigger it there. Wales has no cooker exclusion.

How do landlords and engineers keep cooker records straight?

The cooker is the appliance most likely to change outside the annual rhythm: tenants replace them, installs happen mid-tenancy, and ownership moves from tenant to landlord the moment a lease ends and the appliance stays. That churn is a record-keeping problem more than a gas problem. Manifold keeps every appliance's history against the property, so the install record, each safety record line and any warning notice sit in one place, and the annual renewal is tracked and chased automatically. When an engineer walks into the kitchen next year, who owns the cooker and when it was last checked has an answer on file.