Gas Pipe Installation & Alteration
Need new gas pipework installed, extended, or altered? Whether you’re adding a new gas appliance, renovating your kitchen or bathroom, or require gas pipework rerouted to a new location, all gas pipe work must be carried out by a Gas Safe registered engineer. At AG Heating, our Gas Safe registered engineers install, alter, and repair gas pipework safely, professionally, and to the highest standard — across London and Hertfordshire, available 7 days a week.
5★ reviews
By our customers
Across London, Hertfordshire & beyond
10+ years
Of Experience
Installing & altering gas pipework since day one
Gas Safe
Registered & Fully Insured
Registration #973229
24/7
Flexible Appointments
Weekday, evening & weekend slots available
Professional Gas Pipe Installation & Alteration Services
How We Install & Alter Gas Pipework
When you book AG Heating for gas pipe installation or alteration, our Gas Safe registered engineer will arrive at your property and carry out the full scope of work safely and efficiently. We assess your existing gas supply and pipework, determine the correct pipe sizing and routing, and make all necessary connections — ensuring everything is installed in full compliance with Gas Safe regulations and British Standards (BS 6891).
Our gas pipe installation and alteration service includes:
- Assessment of existing gas supply, meter, and pipework condition
- New gas pipe installation from meter to appliance locations
- Extension of existing pipework to new appliance positions
- Rerouting of gas pipes for kitchen, bathroom, or property renovations
- Correct pipe sizing to ensure adequate gas pressure and flow
- Installation of gas isolation valves and fittings
- Pressure testing of all new and altered pipework
- Gas Safe certificate issued on completion
Most gas pipe installation and alteration jobs are completed in a single visit. Our engineer will walk you through the work carried out before leaving and answer any questions — so you have complete confidence in the safety and compliance of your gas pipework.
What Gas Pipe Work Can We Carry Out?
Our engineers are experienced in a wide range of domestic and commercial gas pipework, including:
✅ New gas pipe installation — from meter to boiler, hob, fire, or any gas appliance
✅ Gas pipe extensions — adding new branch pipes to reach new appliance locations
✅ Gas pipe rerouting — altering pipework routes for kitchen, bathroom, or loft conversions
✅ Gas pipe repairs — fixing leaks, corroded sections, or damaged pipework
✅ Pressure testing — full gas tightness tests on new, altered, or suspect pipework
✅ Commercial gas pipework — installation and alteration for business premises
If you’re unsure what pipework alterations are needed for your project, contact us before booking. Our engineers are happy to assess your situation and advise — and can carry out all necessary work on the same visit where possible.
Why Must Gas Pipe Work Be Done by a Gas Safe Engineer?
It is a legal requirement in the UK that all gas pipe installation and alteration work is carried out by a Gas Safe registered engineer. Attempting to install or alter gas pipework yourself — or using an unregistered tradesperson — is illegal and extremely dangerous. Common risks of improper gas pipework include:
- Gas leaks from poorly fitted joints or connections — a serious fire and explosion hazard
- Carbon monoxide poisoning from incomplete combustion due to inadequate gas supply
- Undersized pipework causing poor appliance performance and unsafe operating conditions
- Insurance claims being invalidated following a gas incident caused by unregistered work
- Failure to meet landlord gas safety obligations under the Gas Safety Regulations 1998
- Non-compliance with British Standards BS 6891 for gas installation pipework
- Pressure loss or gas supply interruption to connected appliances
AG Heating’s engineers are fully Gas Safe registered and carry ID at all times. Every gas pipe installation and alteration is completed to the latest Gas Safe regulations and British Standards, and a certificate is issued upon completion — giving you full peace of mind and a legal record of the work.
What to Expect on the Day
Here’s exactly what happens when AG Heating carries out your gas pipe installation or alteration:
- We arrive on time — with all tools, materials, and equipment required for the job
- We inspect your existing gas supply, meter, and pipework before starting
- We plan and agree the pipe route and any alterations with you before work begins
- New pipework is installed or existing pipework is altered to the agreed specification
- A full gas tightness pressure test is carried out on all new and altered pipework — no exceptions
- Your Gas Safe certificate is issued digitally on the same day
- We walk you through the completed work and answer any questions before we leave
Professional. Compliant. Fully certified. Gas pipe installation and alteration done right.
Why Choose AG Heating for Your Gas Pipe Installation & Alteration?
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Gas Safe Registered
Every gas pipe installation and alteration is carried out by a Gas Safe registered engineer (reg #973229). Your pipework is legal, safe, and fully certified — every time.
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Fixed, Transparent Pricing
We provide a clear, fixed price before any work begins. No hidden charges, no surprise extras — just honest pricing for professional gas pipe installation and alteration work.
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Experienced Gas Pipework Engineers
With 10+ years of experience, our engineers have installed and altered gas pipework across every type of domestic and commercial property — so you can trust the job will be done safely, efficiently, and to the highest standard.
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London & Hertfordshire Coverage
We cover a wide area across London and Hertfordshire, with flexible appointment slots including evenings and weekends — making it easy to get your gas pipework installed or altered at a time that suits you.
Gas Pipe Installation & Alteration — Frequently Asked Questions
Do I need a Gas Safe engineer to install or alter gas pipework?
Yes — it is a legal requirement in the UK that all gas pipe installation and alteration work is carried out by a Gas Safe registered engineer. Attempting to install or modify gas pipework yourself is illegal and dangerous. AG Heating’s engineers are fully Gas Safe registered (reg #973229) and will issue a certificate on completion.
How long does gas pipe installation or alteration take?
Most gas pipe installation and alteration jobs are completed within 1–3 hours, depending on the scope of the work, the length of pipework required, and accessibility. More complex rerouting or multi-appliance installations may take longer. Our engineer will give you an accurate time estimate when booking.
Can you extend gas pipework to a new location in my property?
Yes — our engineers can extend existing gas pipework to any new location within your property, whether you’re adding a new gas appliance, moving a boiler, or fitting a gas hob in a new kitchen position. We’ll assess your existing supply, plan the most efficient route, and carry out all work to Gas Safe regulations and British Standards.
Can you reroute gas pipes as part of a kitchen or bathroom renovation?
Yes — gas pipe rerouting is one of the most common jobs we carry out during kitchen and bathroom renovations. If your existing pipework needs to be moved, re-run, or altered to accommodate a new layout, our Gas Safe registered engineers can do this safely and efficiently, often on the same visit as other gas work.
Do I need new gas pipework if I’m installing a new appliance?
It depends on your existing pipework. If you’re replacing a like-for-like appliance in the same location, your existing pipework may be suitable. However, if you’re adding a new appliance, moving it to a different location, or upgrading to a higher-output appliance, new or altered pipework is likely required. Our engineer will assess this on arrival and advise you before any work begins.
Will I receive a certificate after gas pipe work is completed?
Yes — all gas pipe installation and alteration work carried out by AG Heating is completed by a Gas Safe registered engineer (reg #973229), and a Gas Safe certificate is issued upon completion. This confirms that the pipework has been correctly installed, pressure tested, and is safe to use. Your certificate is sent digitally on the day.
How much does gas pipe installation or alteration cost?
The cost depends on the scope of the work, the length of pipework required, and the complexity of the installation or alteration. We always provide a clear, fixed price before starting work — with no hidden charges or surprise extras. Contact us for a no-obligation quote.
Need Gas Pipework Installed or Altered?
Don’t risk unsafe pipework — book a Gas Safe registered engineer from AG Heating for your gas pipe installation or alteration. We serve customers across London and Hertfordshire, with flexible appointment slots to suit you. Call us today to book your job or get a free, no-obligation quote.
☎ Call: 07400 400 430
✉️ Email: info@agheating.co.uk