24/7 & EMERGENCY?

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
TRACING THE LEAK
CARBON MONOXIDE SAFETY

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?

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

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Uncovered - The Electric Rock Experience
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Amazing as always!
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Bronnie Baynes
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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.
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Sue Davies profile picture
Sue Davies
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Jennings are incredibly efficient and helpful. They’ve completed my boiler service and organised the necessary plumbing and electrical certifications . Great after sales service.
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Diana Gould profile picture
Diana Gould
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Excellent job. Solved a long standing problem quickly and effectively. 100% recommend 👍
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Paul Grecian profile picture
Paul Grecian
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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!
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Brenda Zang
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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!
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Sam Harvey profile picture
Sam Harvey
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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.
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Joe Carreiro
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Service was professional and friendly
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Olive Tree House
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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.
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Stella Ofori
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Tristan was very polite, friendly and very professional. He is also very good at his job and very efficient. Very happy with the service