UK Statutory Instrument 1998 United Kingdom

Gas Safety (Installation and Use) Regulations 1998

What this means for your business

34 obligations
29 penalties
29 can imprison
8 guides
Enforced by
Ofgem
Applies to
United Kingdom
On this page
34 compliance obligations, 8 practical guides across 2 topics
Read full text on legislation.gov.uk

What you must do

34 compliance obligations under this legislation — 29 can result in imprisonment.

Equipment and safety 8

Ensure pipework safely supports suspended gas appliances

2 years imprisonment

If you or your contractors install a gas appliance that hangs from the ceiling or wall, you must make sure the pipework it connects to is built and fitted to safely carry the appliance’s weight, and that the appliance itself is designed for suspended installation. In practice this means checking design calculations, using the right pipe material and fittings, and keeping records of the installation.

Contractor s.31 Historic England When installing a suspended gas appliance

Install and maintain an appropriate emergency gas shut‑off

2 years imprisonment

Whenever you first supply gas to a premises you must fit an emergency shut‑off valve in the right place and make sure it can be reached easily. The valve’s key or lever must be fixed correctly, clearly marked to show whether it is open or closed, and any hand‑wheel must indicate the direction of operation. If the valve is not next to the main meter you must put a permanent notice nearby that tells people what to do if gas escapes, and keep that notice up‑to‑date.

Any Person s.9 Historic England When gas is supplied for the first time to a premises (or …

Install gas appliances and flues safely

2 years imprisonment

When you (or anyone acting for your business) install a gas appliance, you must make sure the flue is the correct type, in good condition and installed where it can be inspected. The flue must be sealed so combustion products can’t escape into other rooms, and power‑operated flues must automatically stop the appliance if the draft fails. In short, only install flues that are suitable, inspectable, sealed and positioned safely.

Any Person s.27 Historic England When installing a gas appliance or its flue

Install gas appliances so they are easily accessible

2 years imprisonment

Whenever you (or your employees/contractors) fit a gas appliance, you must do it so the appliance can be readily reached for use, checking and servicing. This means you cannot hide the appliance behind permanent fixtures or place it where it cannot be safely accessed for regular inspection or maintenance.

Any Person s.28 Historic England When installing a gas appliance

Install only room‑sealed gas appliances in bathrooms, showers and bedrooms

2 years imprisonment

You must not fit a regular gas appliance in a bathroom, shower room or a bedroom (or any cupboard/compartment linked to those rooms) unless it is a room‑sealed unit, or it has a safety control that shuts the appliance off before dangerous gas can build up. This applies wherever you or your contractors install gas appliances, whether in a private home, rental property or commercial premises.

Any Person s.30 Historic England When installing a gas appliance in a bathroom, shower room, sleeping accommodation, …

Install, seal and maintain gas pressure regulators correctly

2 years imprisonment

When you install any gas meter, bypass or connect a gas storage vessel, you must fit a regulator that automatically stops downstream pipework from being over‑pressurised, provide backup protection if the inlet pressure is 75 mbar or more, and ensure any relief valve is vented safely. The regulator must be sealed straight after fitting, and if that seal is ever broken you must replace it promptly with a new, adequate seal. Only authorised gas suppliers may break seals.

Contractor s.14 Historic England When installing a primary gas meter, meter bypass, gas storage vessel or …

Provide a collection vessel and safe removal method for pipework deposits

2 years imprisonment

When you install gas pipework where liquid or solid build‑up could happen, you must fit a clearly visible, easy‑to‑reach container to catch any material and ensure there is a safe way to clean it out. This prevents blockages and keeps the system safe for users.

Any Person s.21 Historic England When installing pipework where deposits of liquid or solid matter are likely

Use a suitable bond to maintain electrical continuity when working on gas fittings

When you or your staff carry out any work on a gas fitting, you must attach a proper bonding device to keep the electrical circuit continuous. This must be in place for the whole time you are working and until the permanent electrical bond is restored, to stop the risk of electric shock or fire.

Contractor s.10 Historic England Whenever work on a gas fitting is performed and there is a …

Inspections 1

Test and verify gas appliances after installation

2 years imprisonment

When you install a gas appliance while the gas supply is already on, you must immediately test that the connection is gas‑tight and check the appliance meets the regulations, the correct pressure, the maker’s instructions and that all safety controls work. If anything is wrong you must either fix it or disconnect/seal the appliance. If you later turn gas onto an appliance that has not been tested, you must have it tested or sealed off before use.

Any Person s.33 Historic England When a gas appliance is installed with gas on the premises, or …

Management duties 23

Act quickly to stop and report any gas leak

2 years imprisonment

If gas leaks from a pipe on your premises or you suspect a leak, you must shut the gas supply off straight away and tell the gas supplier. The gas supplier must then take steps to stop the escape within 12 hours of being notified. You must not turn the supply back on until the leak is fully repaired.

Landlord/Property Owner s.37 Historic England Gas escapes from a pipe on the premises or you suspect a …

Carry out gas work safely and prevent gas escapes

2 years imprisonment

Whenever you or your staff work on gas pipework or install gas equipment, you must take steps to stop gas leaking and ensure any released gas cannot harm anyone. This means sealing every open pipe, not using ignition sources, testing for leaks after work, installing vessels only in safe locations, and never tampering with storage vessels.

Any Person s.6 Historic England When carrying out any work on a gas fitting or installing a …

Coordinate timing of gas safety checks for appliances and flues

2 years imprisonment

If a gas safety check is carried out within the two months before the official deadline, it counts as having been done on the deadline day. As a landlord you can also choose to do the next check within the two months after the deadline to line up the check dates for all appliances or flues in the property, but you may only do this once per item and only to match the dates of other items.

Landlord/Property Owner Determination of date when next safety check due u Historic England When a gas appliance or flue in a rental property is due …

Display permanent emergency notice on or near gas meters

2 years imprisonment

When you first supply gas through a primary meter – whether it’s a brand‑new meter or an existing one you’re using for the first time – you must put a permanent, clearly worded notice next to the meter explaining what to do if gas escapes. If the meter is more than 2 m away from the nearest emergency shut‑off, the notice must also tell people where that shut‑off is.

Trader/Business s.15 Historic England When you first supply gas through a primary meter (newly installed or …

Ensure alterations and work do not compromise existing gas fittings

2 years imprisonment

If you run a business that has gas appliances or storage vessels, you must not carry out any changes to the building that would make those gas fittings unsafe. You also must not do anything else that could make a fitting or its ventilation dangerous. As an employer or self‑employed person you need to put checks in place so any work affecting gas equipment is safe and complies with the Regulations.

Employer s.8 Historic England When you carry out any alteration to premises with existing gas fittings …

Ensure gas appliances are safe and stop use if dangerous

2 years imprisonment

If you run or occupy a premises, you must not use – or let anyone use – a gas appliance that you know or suspect could be dangerous. If you (or a contractor working on gas pipes, storage or fittings) become aware of a possible danger, you must act immediately to stop its use and arrange for it to be repaired, replaced or removed.

Occupier s.34 Historic England When you know or have reason to suspect a gas appliance is …

Ensure gas fittings are properly supported, filtered and protected

2 years imprisonment

If your business installs gas appliances you must make sure every fitting is securely supported, correctly positioned and protected so it isn’t damaged. Where there is any risk of foreign matter blocking the fitting you must fit a suitable filter, and where the fitting could be exposed to corrosive substances you must use corrosion‑resistant material or add protection. Not doing this can lead to criminal prosecution.

Any Person s.7 Historic England When installing a gas fitting

Ensure gas pipework does not compromise building structure or fire resistance

2 years imprisonment

If you (or a contractor you hire) install gas pipework, you must make sure the work does not weaken the building’s structure or any fire‑resistant parts. Check the installation route, use suitable methods and, where needed, get a structural or fire‑engineering sign‑off before the work starts.

Any Person s.20 Historic England When installing gas pipework

Ensure gas work is done by HSE‑approved persons

2 years imprisonment

If you arrange or have any control over gas‑fitting work at a site you manage, you must make sure the person carrying out the work is approved by the Health and Safety Executive. In practice this means checking their qualification or only hiring contractors who are on the HSE‑approved list. The same rule also applies if you are self‑employed and carry out the work yourself.

Employer s.4 Historic England When you require or control any gas‑fitting work at a workplace under …

Ensure only competent, HSE‑approved persons carry out gas work

2 years imprisonment

If your business does any work on gas fittings or gas storage vessels, you must make sure the people doing the work are properly trained and recognised as competent. Where the Regulations require it, they must also be a member of a class of persons approved by the Health and Safety Executive (HSE). Keep written proof of their competence/approval and never allow anyone without it to work on gas equipment.

Employer s.3 Historic England When your business carries out any work on gas fittings, service pipework …

Ensure safe construction and access to external gas meter housings

If your business installs or maintains a gas meter in an external box or compound, you must build it so any gas leak vents to the outside, never store flammable items inside, and if you fit a lock you must give the consumer a clearly labelled key. This keeps the premises safe from gas entering the building.

Any Person s.13 Historic England When a gas meter is housed in a box or compound attached …

Ensure safe installation and work on gas appliances

2 years imprisonment

Whenever you or your staff install, connect, or carry out any work on a gas appliance you must make sure it can be used safely. This means using a permanent rigid pipe for flued appliances, checking used appliances are safe, providing a shut‑off at the inlet (unless impossible), not removing approval markings, testing the flue, combustion air and pressure/heat input after work, and promptly reporting any defects.

Any Person s.26 Historic England When installing, connecting, or performing work on a gas appliance

Ensure safe installation of gas pipework and arrange required electrical bonding

2 years imprisonment

When you install gas pipework you must place it so it can be used safely, taking account of other services, supports and the building structure. If you connect that pipework to a primary gas meter and electrical equipotential bonding might be needed, you must tell the responsible person that a competent person should carry out the bonding work.

Any Person s.18 Historic England When installing gas pipework or connecting pipework to a primary gas meter

Fit shut‑off valve and display permanent gas pipe diagram

2 years imprisonment

If you install gas pipework for a building with a large‑diameter service pipe (50 mm or more for multi‑storey buildings, or 30 mm or more for other service pipework), you must put a clearly visible, easily reachable valve on that pipe and attach a permanent line diagram showing the pipe layout near the main meter or gas storage. This lets anyone quickly shut off the gas and understand the installation.

Contractor s.24 Historic England Service pipe to a building with two or more floors (or any …

Install and verify automatic flue dampers safely

2 years imprisonment

When you fit a gas appliance you must use an automatic flue damper that is mechanically linked to the gas supply so the burner cannot run if the damper fails. After fitting, you must check the appliance and damper together to confirm they are safe to use. Manual dampers must not be used on domestic gas appliances unless they are permanently held open.

Any Person s.32 Historic England When installing a gas appliance with a flue damper (or fitting an …

Install gas meters safely and in compliance with fire safety rules

2 years imprisonment

Whenever you fit a gas meter you must make sure the location does not block fire‑escape routes, the meter is built to stop gas leaking in a fire, it is protected from electrical damage and placed where it can be easily reached for inspection. You must also avoid rigid pipe connections on soldered joints, test the installation for gas tightness and then purge the system to remove air and any other gases before the meter is put into service.

Contractor s.12 Historic England When installing a gas meter

Keep gas appliances and flues safe, inspected yearly and record checks

2 years imprisonment

If you let residential premises, you must make sure any gas appliances and their flues are kept in safe condition, have them checked by a qualified person at least once a year, keep detailed records of each check and give a copy of those records to your tenants (or display them). You also must not install gas appliances in bedrooms that breach the regulations.

Landlord/Property Owner s.36 Historic England

Keep gas appliances and pipework safe at work

2 years imprisonment

If you run a business or work for yourself, you must make sure any gas appliances, pipework or flues at your workplace are kept in a safe condition to prevent injury. This means carrying out regular checks, servicing, and fixing any faults promptly.

Employer s.35 Historic England

Leave manufacturer’s instructions with the owner or occupier

2 years imprisonment

When you install a gas appliance you must give the owner or occupier the full set of instructions that came with the product. This ensures they know how to use and maintain the appliance safely. It is a simple step you need to do as part of every gas‑appliance installation.

Any Person s.29 Historic England When you install a gas appliance

Manage installation, signage and safe removal of primary gas meters

You must not install a pre‑payment meter as the main meter that feeds other meters, must display a permanent notice whenever more than one primary meter is fed from the same pipe, and when a primary meter is taken out you must close any dedicated valve, seal the outlet, clearly mark the live pipe and, if the meter isn’t replaced within 12 months, disconnect and seal the pipe. You also need to give the gas supplier enough notice before you remove a meter.

Any Person s.16 Historic England When you install, supply gas to, modify or remove a primary gas …

Notify gas supplier and follow written directions for pressure‑fluctuation equipment and gaseous substances

2 years imprisonment

If your business runs equipment that could cause pressure fluctuations in the gas network, you must obey any instructions the gas supplier (transporter) gives you. If you plan to use any other gas (including compressed air) together with your gas supply, you must give the supplier at least 14 days’ written notice and then follow any written directions they issue to keep that gas out of the supply. Any device the supplier requires you to install must be kept in good working order.

Trader/Business s.38 Historic England When you use gas for plant that may cause pressure fluctuations, or …

Test, coat, purge and seal gas pipework after any work

Whenever you (or your employees) carry out work on gas pipework that could affect its tightness, you must immediately test it for leaks, apply any required protective coating, purge the system to remove air and unwanted gas, and seal off any outlets that won’t be used straight away. If a connection was loosened during the work you must retest it after tightening, and all seals must be checked for leak‑tightness.

Contractor s.22 Historic England After any work on gas installation pipework that may affect gastightness, or …

Use safe, approved materials and workmanship for gas installations

2 years imprisonment

When you or your staff install, repair or maintain gas pipes, fittings or storage vessels, you must only use parts that are well‑made, strong enough and suitable for the type of gas. Lead pipes and most plastic pipework are prohibited unless the specific exemptions apply, and all work must follow recognised standards to prevent danger.

Any Person s.5 Historic England When installing, repairing, or maintaining gas fittings or storage vessels

Other requirements 1

Mark gas pipework and keep the marking visible

2 years imprisonment

If you install any gas pipework that can be inspected – for example in a factory, office or shop – you must permanently mark it so anyone can see it is a gas pipe. The person responsible for the premises must also make sure that marking stays clear for as long as the pipe is used to carry gas.

Any Person s.23 Historic England Installation of gas pipework (accessible to inspection) in premises that are not …

Record keeping 1

Display and keep up‑to‑date a gas line diagram for secondary meters

If you supply gas to a secondary meter you must have a permanent diagram showing how the primary meter, secondary meter(s), pipework and any emergency shut‑offs are arranged. The diagram has to be clearly visible near the primary meter (or gas storage) and near any emergency controls, and you must update it whenever you change the layout.

Any Person s.17 Historic England When you supply gas through a primary meter to a secondary meter, …

Penalties for non-compliance

29 penalties under this legislation. 29 can result in imprisonment. 29 carry an unlimited fine.

Prison risk

Ensure pipework safely supports suspended gas appliances

Unlimited fine and/or 2 years imprisonment

Either way s.31 Penalises: Ensure pipework safely supports suspended gas appliances
Prison risk

Install and maintain an appropriate emergency gas shut‑off

Unlimited fine and/or 2 years imprisonment

Either way s.9 Penalises: Install and maintain an appropriate emergency gas shut‑off
Prison risk

Install gas appliances and flues safely

Unlimited fine and/or 2 years imprisonment

Either way s.27 Penalises: Install gas appliances and flues safely
Prison risk

Install gas appliances so they are easily accessible

Unlimited fine and/or 2 years imprisonment

Either way s.28 Penalises: Install gas appliances so they are easily accessible
Prison risk

Install only room‑sealed gas appliances in bathrooms, showers and bedrooms

Unlimited fine and/or 2 years imprisonment

Either way s.30 Penalises: Install only room‑sealed gas appliances in bathrooms, showers …
Prison risk

Install, seal and maintain gas pressure regulators correctly

Unlimited fine and/or 2 years imprisonment

Either way s.14 Penalises: Install, seal and maintain gas pressure regulators correctly
Prison risk

Provide a collection vessel and safe removal method for pipework deposits

Unlimited fine and/or 2 years imprisonment

Either way s.21 Penalises: Provide a collection vessel and safe removal method …
Prison risk

Test and verify gas appliances after installation

Unlimited fine and/or 2 years imprisonment

Either way s.33 Penalises: Test and verify gas appliances after installation
Prison risk

Act quickly to stop and report any gas leak

Unlimited fine and/or 2 years imprisonment

Either way s.37 Penalises: Act quickly to stop and report any gas …
Prison risk

Carry out gas work safely and prevent gas escapes

Unlimited fine and/or 2 years imprisonment

Either way s.6 Penalises: Carry out gas work safely and prevent gas …
Prison risk

Coordinate timing of gas safety checks for appliances and flues

Unlimited fine and/or 2 years imprisonment

Either way Determination of date when next safety check due u Penalises: Coordinate timing of gas safety checks for appliances …
Prison risk

Display permanent emergency notice on or near gas meters

Unlimited fine and/or 2 years imprisonment

Either way s.15 Penalises: Display permanent emergency notice on or near gas …
Prison risk

Ensure alterations and work do not compromise existing gas fittings

Unlimited fine and/or 2 years imprisonment

Either way s.8 Penalises: Ensure alterations and work do not compromise existing …
Prison risk

Ensure gas appliances are safe and stop use if dangerous

Unlimited fine and/or 2 years imprisonment

Either way s.34 Penalises: Ensure gas appliances are safe and stop use …
Prison risk

Ensure gas fittings are properly supported, filtered and protected

Unlimited fine and/or 2 years imprisonment

Either way s.7 Penalises: Ensure gas fittings are properly supported, filtered and …
Prison risk

Ensure gas pipework does not compromise building structure or fire resistance

Unlimited fine and/or 2 years imprisonment

Either way s.20 Penalises: Ensure gas pipework does not compromise building structure …
Prison risk

Ensure gas work is done by HSE‑approved persons

Unlimited fine and/or 2 years imprisonment

Either way s.4 Penalises: Ensure gas work is done by HSE‑approved persons
Prison risk

Ensure only competent, HSE‑approved persons carry out gas work

Unlimited fine and/or 2 years imprisonment

Either way s.3 Penalises: Ensure only competent, HSE‑approved persons carry out gas …
Prison risk

Ensure safe installation and work on gas appliances

Unlimited fine and/or 2 years imprisonment

Either way s.26 Penalises: Ensure safe installation and work on gas appliances
Prison risk

Ensure safe installation of gas pipework and arrange required electrical bonding

Unlimited fine and/or 2 years imprisonment

Either way s.18 Penalises: Ensure safe installation of gas pipework and arrange …
Prison risk

Fit shut‑off valve and display permanent gas pipe diagram

Unlimited fine and/or 2 years imprisonment

Either way s.24 Penalises: Fit shut‑off valve and display permanent gas pipe …
Prison risk

Install and verify automatic flue dampers safely

Unlimited fine and/or 2 years imprisonment

Either way s.32 Penalises: Install and verify automatic flue dampers safely
Prison risk

Install gas meters safely and in compliance with fire safety rules

Unlimited fine and/or 2 years imprisonment

Either way s.12 Penalises: Install gas meters safely and in compliance with …
Prison risk

Keep gas appliances and flues safe, inspected yearly and record checks

Unlimited fine and/or 2 years imprisonment

Either way s.36 Penalises: Keep gas appliances and flues safe, inspected yearly …
Prison risk

Keep gas appliances and pipework safe at work

Unlimited fine and/or 2 years imprisonment

Either way s.35 Penalises: Keep gas appliances and pipework safe at work
Prison risk

Leave manufacturer’s instructions with the owner or occupier

Unlimited fine and/or 2 years imprisonment

Either way s.29 Penalises: Leave manufacturer’s instructions with the owner or occupier
Prison risk

Notify gas supplier and follow written directions for pressure‑fluctuation equipment and gaseous substances

Unlimited fine and/or 2 years imprisonment

Either way s.38 Penalises: Notify gas supplier and follow written directions for …
Prison risk

Use safe, approved materials and workmanship for gas installations

Unlimited fine and/or 2 years imprisonment

Either way s.5 Penalises: Use safe, approved materials and workmanship for gas …
Prison risk

Mark gas pipework and keep the marking visible

Unlimited fine and/or 2 years imprisonment

Either way s.23 Penalises: Mark gas pipework and keep the marking visible

Practical guidance

Our guides explain how to comply with the requirements above.

Sections and provisions

43 classified provisions from this legislation.

Duties 35

  • s.3 Qualification and supervision work in relation
  • s.4 Duty on employer work in relation
  • s.5 Materials and workmanship work in relation
  • s.6 General safety precautions work in relation
  • s.7 Protection against damage person
  • s.8 Existing gas fittings alteration
  • s.9 Emergency controls person
  • s.10 Maintaining electrical continuity person
  • s.12 Meters—general provisions person
  • s.13 Meter housings person
  • s.14 Regulators person
  • s.15 Meters—emergency notices person
  • s.16 Primary meters person
  • s.17 Secondary meters
  • s.18 Safe use of pipes person
  • s.20 Protection of buildings person
  • s.21 Clogging precautions person
  • s.22 Testing and purging of pipes person
  • s.23 Marking of pipes
  • s.24 Large consumers person
  • ... and 15 more duties

Offences and penalties 1

  • s.39 Exception as to liability

Powers 1

  • s.40 Exemption certificates

Definitions 3

  • s.2 General interpretation and application
  • s.11 Interpretation of Part C
  • s.25 Interpretation of Part E

Exemptions 1

  • s.19 Enclosed pipes