Gas Leak Detection in London
Smell gas? Get out, then call 0800 111 999
Our gas leak detection service in London traces and repairs leaks on gas pipework and appliances on your side of the meter. If you smell gas, leave the property, do not use light switches or naked flames, and call the National Gas Emergency Service on 0800 111 999. Once it is safe, our Gas Safe registered engineers will find the leak, repair it and carry out a gas tightness test. Gas leaks are one part of our leak detection work, and we look after everything from boilers to cookers through our gas services.
Finding and fixing gas leaks safely
GAS LEAK REPAIRS
SMELL GAS? CALL 0800 111 999 FIRST
National Gas Emergency Service, 24/7
Once the emergency service has made things safe, our Gas Safe engineers trace the leak, repair the pipework or appliance and test the installation before it goes back into use.
GAS TIGHTNESS TESTING
- Pressure test of the whole installation
- Shows whether gas is escaping
- Carried out after every gas repair
- Confirms it is safe to use
TRACING THE LEAK
- Electronic gas detectors along pipe runs
- Joints, valves and fittings checked
- Appliance connections and hoses tested
- Leak detection fluid pinpoints the spot
CARBON MONOXIDE SAFETY
- Carbon monoxide alarm installation
- Checks for signs of poor combustion
- Gas appliance safety checks
- Advice on ventilation and flues
How we find and repair a gas leak
- Tightness test: We connect a pressure gauge at the gas meter and test the whole installation. If the pressure drops, we know gas is escaping somewhere.
- Trace the leak: We check each section of pipework, every joint and each appliance connection with an electronic gas detector and leak detection fluid until we find the source.
- Repair and retest: We repair or replace the faulty section, test again to prove the installation is gas tight, then restore the supply and check your appliances.
What to do if you smell gas
Leave the property straight away, opening doors and windows as you go if it is safe to do so. Do not use light switches, plugs or doorbells, and do not smoke or light a flame. Turn off the gas at the meter if you can reach it easily, then call the National Gas Emergency Service on 0800 111 999 from outside. They will make the supply safe. You will then need a Gas Safe registered engineer to find and repair the leak, and that is where we come in.
Carbon monoxide has no smell at all, so fit a carbon monoxide alarm too.
Areas we cover
From busy city hubs to peaceful suburban neighborhoods, we’ve got London covered. Our expert property maintenance services ensure your home or business stays in top condition, no matter where you are in Greater London.
Why choose Jennings?
- Clear, competitive pricing
- No call-out fee, free fixed-price quotes
- Gas Safe registered engineers
- Tidy, honest and reliable
- Work guaranteed for up to 18 months
- Covering homes and businesses across London
Visit our Pimlico shop
Our shop on Lupus Street in Pimlico stocks quality plumbing, heating and electrical supplies from trusted brands. Tradespeople and DIYers are both welcome, and our team is always happy to give advice.
See what our valued customers have to say
EXCELLENT
Based on 323 reviews
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Uncovered - The Electric Rock ExperienceTrustindex verifies that the original source of the review is Google.
Amazing as always!Posted on Google![]()
Bronnie BaynesTrustindex verifies that the original source of the review is Google.
Amazing communication and good availability. plumber was extremely professional and arrived on time. Wish there was a bit more transparency on additional payments ie. parking and sealant.Posted on Google![]()
Sue DaviesTrustindex verifies that the original source of the review is Google.
Jennings are incredibly efficient and helpful. They’ve completed my boiler service and organised the necessary plumbing and electrical certifications . Great after sales service.Posted on Google![]()
Diana GouldTrustindex verifies that the original source of the review is Google.
Excellent job. Solved a long standing problem quickly and effectively. 100% recommend 👍Posted on Google![]()
Paul GrecianTrustindex verifies that the original source of the review is Google.
What a fantastic company! From my first conversation with Sian to installation of my new Vaillant boiler they have been absolutely brilliant. Sian responded instantly via What's App when ever I had a question regarding pricing and installation. Sam the installer and his colleague with very friendly, professional, tidy and talked me through the full installation once completed. I have already given contact details to some of my work colleague's this morning. I will use them to service my boiler going forward in the future and for any other plumbing needs. Absolutely 1st Class Company!Posted on Google![]()
Brenda ZangTrustindex verifies that the original source of the review is Google.
Excellent service from start to finish. Had a new boiler installed and a full power flush carried out. Everything was done professionally, efficiently, and to a very high standard. The team were friendly, tidy, and kept us informed throughout. Highly recommend!Posted on Google![]()
Sam HarveyTrustindex verifies that the original source of the review is Google.
Easily one of the best experiences I’ve had with tradesmen. Sian was super friendly and helpful, and then Harry showed up early, fixed the issue promptly and was a legend! Highly recommended.Posted on Google![]()
Joe CarreiroTrustindex verifies that the original source of the review is Google.
Service was professional and friendlyPosted on Google![]()
Olive Tree HouseTrustindex verifies that the original source of the review is Google.
I’ve been dealing with ongoing pump issues for as long as I can remember, and after multiple visits from different plumbers, nothing ever fully got resolved. Harry from Jennings was the first to actually diagnose the problem and sort it in one visit. Professional, efficient, and clearly knows his craft inside out. I couldn’t recommend Jennings more highly.Posted on Google![]()
Stella OforiTrustindex verifies that the original source of the review is Google.
Tristan was very polite, friendly and very professional. He is also very good at his job and very efficient. Very happy with the service