Where appliances or pipework are no longer needed — ahead of a refurbishment, strip-out or change of use — ComGas safely purges, disconnects and caps redundant commercial gas installations, sequenced around your wider project programme across Surrey and surrounding counties.
Decommissioning is the gas-safety task within a wider refurbishment project.
When a building is being refurbished, stripped out or repurposed, gas appliances and pipework that are no longer required need to be safely taken out of service — purged, disconnected and capped so the redundant installation presents no ongoing risk. This is a specific gas-safety task, distinct from the wider refurbishment or fit-out project it usually sits within.
ComGas carries out gas decommissioning for commercial buildings across Surrey and surrounding counties, working around the sequencing of the broader project. Where the redundant installation is only part of a larger building being refurbished, we confirm exactly what is being decommissioned and what, if anything, remains in service, so nothing is disconnected in error.
ComGas Services UK Ltd Commercial gas decommissioning from Farnham, Surrey.
Gas decommissioning services
Safe removal of redundant appliances and pipework from service.
From a single redundant appliance to a full strip-out ahead of refurbishment, we scope decommissioning around what is actually being removed and what remains.
Appliance Decommissioning
Safely isolating and disconnecting individual gas appliances that are no longer required, capping the supply as appropriate.
Isolation and disconnection of redundant appliances
Capping of the supply to the removed appliance
Confirmation of remaining installation unaffected
Suitable for single-item or multi-appliance removals
Confirm the scope first, then purge, disconnect and cap.
Before any decommissioning work begins, we confirm exactly which appliances and pipework are being removed from service and which, if any, remain in use — particularly important where a building is only partially affected by a refurbishment. Once the scope is agreed, the affected section is purged of gas, physically disconnected and safely capped.
On completion, we confirm what has been decommissioned and, where the wider installation remains in service, that it continues to operate as expected. Documentation covering the work carried out is provided so there is a clear record for the building owner or the wider project team.
Scope of decommissioning confirmed before work begins
Purging of the affected pipework section
Safe physical disconnection and capping
Remaining installation confirmed unaffected
Documentation of the completed work provided
Sequenced around the wider refurbishment programme
Sequenced around your refurbishment, not treated as a standalone task.
Gas decommissioning is very often one task within a larger refurbishment, strip-out or change-of-use project involving several trades. We work with the main contractor or project team to sequence decommissioning at the right point in the programme, so redundant gas installations are safely out of the way before other works proceed, without disrupting parts of the building that remain in use.
Sequenced alongside a wider refurbishment or strip-out programme
Co-ordinated with main contractors and other trades
Redundant installations cleared before follow-on works begin
Remaining parts of the building kept unaffected where required
Confirmation issued to the project team on completion
Scope confirmed and agreed before work is programmed
Genuine reviews from ComGas customers, submitted through Google.
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Nick
3 September 2026
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Matt from ComGas Services UK Ltd was very professional, polite, friendly and quick installing a new shower in my bath (and at a better height for me) and a much easier press-in plug for my sink! He left the place spotless. This is the kind of service and installation people dream about - a 5 star service (see photos).
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Laura Peters
17 August 2026
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I have used Comgas twice and both times have been very happy with the service. Very friendly and honest. The most recent time, the job turned out to be a lot bigger than they initially thought but it was no issue and Paul stayed the extra time to make sure the job was done properly! He was really tidy, took a lot of care with the work that was done and took the time to explain what he was doing and why. Pleased to have found a reliable heating company!
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James Ross
8 August 2026
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I had an issue with my boiler and Matt came out to have a look the same day and managed to fix it. Great, professional service. Highly recommend.
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Ian Chevalier
11 June 2026
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First time we've used this company and it won't be the last. Very professional and efficient in everything they do and Matt was excellent in his knowledge and efficiency when dealing with our gas and plumbing problems.
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Karen Flackett
20 May 2026
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Excellent service. Matt came & fitted 2 taps & waste pipes he was polite & friendly & carried out the work efficiently & in a timely manner.
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Paul Norris
30 April 2026
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Fantastic experience from the chaps at ComGas! Special thanks to Matt who removed an old boiler and replaced with a new energy efficient to satisfy the demands of a five bed house with a few bathrooms/baths and showers. The ComGas admin team and Lee were fantastic too on the booking and administration side of things!
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Julie Galvin
21 April 2026
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Here at St Joseph's we have worked with Comgas for a number of years. They have completed big projects and undertake regular maintenance for our school. They price fairly, and their work is completed to a very high standard. All the engineers carry a DBS which makes life so much easier when trying to book an engineer visit.
On the rare occasion that we have an emergency I can trust that Lee will get one of his engineers to respond quickly and efficiently.
Nothing is too much trouble and no job is too small.
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Chesca Haley
16 April 2026
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Lee and the team are amazing! So helpful, so knowledgeable and really look after their customers. Highly recommend.
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Sarah Rogers
6 April 2026
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Absolutely amazing service, always a thorough job and very knowledgable. Really nice guys too. Lee has sorted numerous issues at work and around our house. We have recommended to friends and family who are also very happy
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Alison Molan
25 March 2026
Trustindex verifies that the original source of the review is Google.
Lovely engineers, Matt and Jack, were a pleasure to have in the house. Thorough, knowledgeable, tidy and polite. Would highly recommend.
Gas decommissioning FAQs
Questions about commercial gas decommissioning
Common questions about safely removing redundant gas installations from service.
Decommissioning means safely purging any gas remaining in the affected pipework, physically disconnecting it, and capping the supply so the redundant installation is left in a safe condition. The exact scope is confirmed with you before work begins.
Can you decommission part of an installation while the rest stays in use?
Yes. Where only part of a building is being refurbished or changed, we identify exactly which appliances and pipework are being removed from service and confirm that the remaining installation is unaffected and continues to operate normally.
Do you provide documentation once decommissioning is complete?
Yes. We confirm what has been decommissioned and provide documentation of the work carried out, which can be passed to the building owner, the main contractor or the wider project team as required.
Can decommissioning be sequenced around a wider refurbishment project?
Yes. Decommissioning is commonly one task within a larger refurbishment or strip-out programme. We work with main contractors and other trades to sequence the work at the appropriate point, so it does not hold up or conflict with the rest of the project.
Is purging always part of a decommissioning job?
In most cases, yes — pipework being taken permanently out of service is purged of gas before it is physically disconnected and capped. See our Gas Purging page for how that stage of the process works.
Planning a refurbishment that involves redundant gas appliances or pipework?
Tell us what is being removed from service, whether it is part of a wider project, and any programme constraints. We can advise on how decommissioning fits around the rest of the works.