KB Heating & Plumbing: Gas Engineer & Plumber in Cardiff

KB Heating & Plumbing is a Gas Safe registered gas engineer and plumber in Cardiff, Wales, with 20 years in the trade. We won Gas Engineering & Plumbing Services of the Year, Glamorgan, at the Prestige Awards 2026. Flooded home? No hot water? A drain backing up? Call 07812 510121 and we’ll get someone out to you, any hour.

Fully Qualified & Insured Plumber

24/7 Emergency Service Available

Locally Owned & Operated in Cardiff

Prestige Awards 2026 Winner

You need a plumber right now, not tomorrow. Maybe the hot water has stopped in the middle of winter, there’s water spreading across your floor, or that slow drain has finally blocked completely. Call +44 7812 510121 and an engineer will be on the way.

Why Cardiff Homeowners Call Us First

Five-Star Reviews

Customers rate us 5 stars on Google and Facebook. We turn up on time, charge what we quoted and fix the job properly.

45-Minute Average Response

Our vans dispatch from Cardiff CF14, so they're already in your neighbourhood. Emergency calls get priority, day or night.

No Diagnosis Fee

We don't charge just to tell you what's wrong. You get a clear explanation and an upfront price before we start work.

Fixed Right or It's Free

If you're not happy with our work, we come back and put it right at no charge. If we can't fix it to your satisfaction, you don't pay.

What Cardiff Customers Say

    
 
 
         
   Sam abdul 
 
 
 
 Trustindex verifies that the original source of the review is Google. We honestly can’t thank Kas enough. After dealing with several contractors who gave us completely wrong advice, Kas truly saved the day.

They say advice is gold — and Kas really is gold. When he gives advice, it’s either honest or honest… there’s no other option. That level of trustworthiness is rare these days.

He is extremely professional, incredibly knowledgeable, and clearly knows his job inside out. From start to finish, he gave us confidence and peace of mind when we needed it most.

If you want someone you can truly trust, who knows exactly what they’re doing and puts honesty first, Kas is the person to call. Highly recommended!
  
 
        
   Farrah 
 
 
 
 Trustindex verifies that the original source of the review is Google. We had our combi boiler replaced by KB Heating & Plumbing and I genuinely can't thank and praise KB Heating & Plumbing enough. Straight from the initial meeting we felt in safe hands and trusted their guidance which made the journey of replacing our boiler so much more easier. They were so! understanding and helpful of our needs, requirements and timescale.

Their professionalism, efficiency, accuracy and attention to detail is something so rare to find these days and they left no mess behind either. We are delighted to confirm we had this amazing experience in not only getting the job done but also meeting humble,  down to earth brilliant people. Nothing was too much trouble for them.

It's a reassuring feeling to know that we will never have to shop around for any heating and plumbing needs that we may have in the future, as we were blessed with the best.

If anyone needs plumbing and heating jobs done and want the work done to a high standard and at a great price too, you can stop looking and call KB Heating & Plumbing. We honestly can't recommend them enough. ⭐️⭐️⭐️⭐️⭐️...
  
 
        
   Laura Morgan 
 
 
 
 Trustindex verifies that the original source of the review is Google. Amazing experience with the company and would highly recommend if you are looking for a professional service with top notch communication
Thank you again
  
 
        
   richard davies 
 
 
 
 Trustindex verifies that the original source of the review is Google. Highly recommended, friendly, efficient, supportive and explained everything to complete the repair. Can’t thank you enough for coming out at short notice, to complete the repair to the boiler.
  
 
        
   Noor Rassam 
 
 
 
 Trustindex verifies that the original source of the review is Google. The best gas engineer im Cardiff! Reliable and trustworthy
  
 
        
   Francesco 
 
 
 
 Trustindex verifies that the original source of the review is Google. I have had a great experience with this company.. i will keep using him incase other problems. Fixed home boiler and my business boiler too. Great service, nice man, I recommend to anyone for his service. Trustworthy. Thank you 🙏
  
 
        
   Empire Cardiff 
 
 
 
 Trustindex verifies that the original source of the review is Google. I highly recommend this company. The service provided was outstanding. They were very efficient at repiping. They added a gas locking system, which i am extremely pleased with. The work carried out was neat. They did not let me down as they worked with the time frame that I provided.
  
 
        
   Nesaor Ali 
 
 
 
 Trustindex verifies that the original source of the review is Google. Very reliable, excellent workmanship. I would recommend KB for heating and plumbing work.
  
 
        
   Dr Ali Nazemi 
 
 
 
 Trustindex verifies that the original source of the review is Google. Amazing service with professionalism and tidiness and happy face and specially with competitive prices. Will certainly use them again and again and again

Gas Engineer in Cardiff

Nobody thinks about their gas until something goes wrong. The water goes cold mid-shower, or you come downstairs on a January morning in Cardiff and the heating has packed in overnight. We’ve stood in plenty of kitchens in Roath and Cathays while people were still in their dressing gowns working out what happened.

KB Heating & Plumbing brings 20 years of trade experience to Cardiff homes. Terraces in Splott. Flats in Cardiff Bay. Big old semis in Pontcanna where the pipework looks like it was put in during the war. Every job is different but the aim is always the same. Find the problem, be straight with the homeowner about what needs doing, fix it properly, and tidy up.

If your gas is playing up, do not sit on it. Tell us what is going on, give us a few details, and we will sort it out.

Boiler Installation in Cardiff

KB Heating & Plumbing installs combi, system and condensing boilers across Cardiff, Penarth, Caerphilly and the Vale of Glamorgan. KB Heating & Plumbing is Gas Safe registered (number 516445), removes the old boiler, fits the new one and tests the whole system before handover.

KB Heating & Plumbing also repairs and services boilers, with 24/7 emergency call-outs.

See boiler installation, boiler repair and boiler servicing in Cardiff. For everything in one place, see all boiler services in Cardiff.

Emergency Gas Engineer in Cardiff

KB Heating & Plumbing answers gas emergencies across Cardiff 24 hours a day, 7 days a week. If you smell gas, call the National Gas Emergency line on 0800 111 999 first, then call KB Heating & Plumbing to find and fix the leak.

Gas Safety Certificate in Cardiff

Most landlords we meet are decent people who just got busy and let the renewal date sneak up on them. The letting agent has started chasing, the tenant has mentioned it, and now there is a bit of a scramble. Happens all the time. We are not judging, we are just here to get it sorted.

A gas safety certificate, a lot of people call it a CP12, is basically a written record that someone qualified came and checked your gas appliances and pipework and everything was safe. The inspection follows a CP12-style format. KB Heating & Plumbing checks each appliance in the home, how it burns, whether the flue is working and the ventilation, and writes it all down. You get a copy at the end.

The checks that catch people out most often in Cardiff? Old gas fires that have not been touched in years. Boilers in houses that have changed hands two or three times with no paperwork trail. If either of those sound familiar, book sooner rather than later. Finding a problem during a routine check is a lot easier to deal with than finding one when your certificate has already expired.

KB Heating & Plumbing covers all of Cardiff, including Cardiff Bay, Roath, Canton and Cathays.

Landlord Gas Safety Check in Cardiff

Landlords have plenty to keep track of, but the annual gas safety check isn’t one to let slip.

Under Regulation 36 of the Gas Safety (Installation and Use) Regulations 1998, most rented homes need a gas safety check every single year. After it is done you have got 28 days to get the record to your tenant and you need to keep a copy for yourself too. The HSE’s landlord gas safety page has the full breakdown of your responsibilities if you want to read through it.

KB Heating & Plumbing carries out landlord gas safety checks across Cathays and Roath, where there are loads of shared houses and student lets. The properties that tend to cause headaches are the ones with a gas fire in the front room that nobody has looked at since the nineties, or a back boiler tucked behind a panel that the current tenant has never even opened. We find these things, we tell you what they mean, and we give you the options without making it complicated.

Sorting this every year also protects you. If something does go wrong and you have got up to date records, you are in a much stronger position. It is not just a legal box to tick.

Gas Leak Detection in Cardiff

KB Heating & Plumbing finds and repairs gas leaks in Cardiff homes. If you smell gas, do not look for the leak yourself: open the windows, get out, and call the National Gas Emergency line on 0800 111 999, which is open 24 hours a day. Once the area is safe, KB Heating & Plumbing finds exactly where the leak is, tests the surrounding pipework and confirms everything is safe before the gas goes back on.

A woman in Roath once called KB Heating & Plumbing after smelling eggs behind her cooker; there was a small leak at a connection that had been there for a while. Older terraced streets in Roath have pipe runs going back decades, and small slow leaks give no warning until they fail.

Gas Appliance Repair in Cardiff

Not every gas job is an emergency. Sometimes the boiler fires up, runs for twenty minutes, then cuts out, and a reset doesn’t help.

We hear this one a lot in Cardiff, especially from October onwards when the heating goes back on after sitting unused all summer. Boilers that cut out repeatedly, gas fires that click without lighting, cookers where half the rings have stopped working. These things are frustrating but most of them are fixable without ripping out the whole appliance.

The most common culprits we see are safety valves that have tripped because of a blocked burner, gas fires that have not been serviced and are just tired and dirty, and boilers with pressure or airflow issues that a reset was never going to solve. We check properly, find the actual fault, and tell you what it will take to fix it. If it is not worth repairing we will say so. We are not going to string you along on an appliance that is done.

Gas Cooker Installation in Cardiff

KB Heating & Plumbing installs gas cookers across Cardiff, and the jobs vary more than you would think. Some are quick and clean. Old cooker out, new one in the same spot, connection checked, done in an hour. Others are more of an adventure, especially when someone has bought a big range cooker online and the gas supply in their Victorian kitchen in Canton was never built to handle it.

The rule on this is simple. Anyone doing gas work in the UK has to be on the Gas Safe Register. There is no workaround on that. KB Heating & Plumbing is on the Gas Safe Register. Having someone unregistered connect a gas cooker is genuinely dangerous, regardless of how handy they are with a spanner.

When we fit a cooker we check the supply, make the connection properly, run a leak check, and test the thing before we leave. We will also walk you through the basics of using it safely, especially if it is a different type to what you had before. A few minutes explaining how the safety cut-off works is worth it.

Gas Hob Installation in Cardiff

A built-in gas hob is one of the most common things people add during a kitchen refit in Cardiff. New worktop, new cabinets, new hob to match. The bit that sometimes gets forgotten is that the gas connection needs doing properly before the rest of the kitchen gets built around it.

We get called in on refits where the hob has been left right to the end. The cabinets are in, the worktop is down, and there is barely room to reach the connections. We can usually still make it work but it takes longer and it is more awkward than it needs to be. Our honest advice is always the same. Get the gas sorted before the worktop goes down. It is a much cleaner job and it avoids any last minute stress when the kitchen fitter is waiting to sign off.

The hob needs the right connection, tested for leaks and pressure, before it gets used. We fit it, test it, and confirm it is safe before we go.

Gas Fire Service in Cardiff

Cardiff has a lot of period homes and a lot of period homes have gas fires. Pontcanna, Roath, Cathays, you see them everywhere. Original Victorian fireplaces that were converted to gas at some point, sometimes recently, sometimes decades ago. Sometimes with paperwork, often without.

A gas fire can look and sound completely normal while something is quietly wrong with the flue or the combustion. We found a blocked flue on a fire in Pontcanna last year that had been running all winter. The family had no idea. The fire lit, it burned, they were warm. But the flue was not drawing properly and combustion gases were not going where they should. That is the sort of thing that does not announce itself until it is a serious problem.

We clean the burner and components, check the flue and seals, and look at how the fire is actually burning. Uneven flames, odd colour, sooting around the surround, all of these are things we check for. We tell you what we find in plain language and what, if anything, needs doing about it.

Gas Pipe Installation in Cardiff

Cardiff is an old city. A lot of the housing stock is old too. The gas pipe runs in many of these homes were put in to serve appliances and layouts that no longer exist, and when you start moving things around or adding to the property the existing pipework quickly runs out of reach.

Extensions, loft conversions, room changes, moving a boiler from one wall to another. All of these can mean new pipework. It is not just a case of running a pipe from one place to another. The route needs planning, the fittings need to be right, every joint needs to be secure, and the whole thing needs a pressure test at the end before anything gets connected to it.

We have done this kind of work in flats in Cardiff Bay where the pipe had to travel further than expected and in small terraces in Splott where there was not much room to work with. We plan it first, do it properly, and test it before we hand it over.

Gas Line Testing in Cardiff

If you have just had work done on your gas pipework, or your appliances seem to be running weaker than usual, a tightness test tells you whether the system is holding pressure the way it should.

It is a fairly simple test. We put a controlled pressure into the pipework and watch to see if it holds. If the pressure drops, there is a leak somewhere. It gives you a definite answer, which is more useful than a vague feeling that something might not be right.

KB Heating & Plumbing runs tightness tests across Cathays and similar areas where there are a lot of student lets. Connections get knocked during tenant moves, small jobs get done by people who should not have been doing them, and nobody checks the pipework afterwards. A quick tightness test catches any of that before it becomes a problem. Pass or fail, you know where you stand.

Frequently Asked Questions

When should I call a gas engineer in Cardiff?

If you smell gas, hear hissing near a pipe or appliance, or your boiler or fire keeps cutting out for no clear reason, call. Gas problems do not tend to sort themselves out and leaving them rarely makes anything better.

What should I do if I smell gas at home?

Get out. Open the windows on your way out if you can do it quickly, do not touch any switches, no lighters, no flames. Once you are outside call the national gas emergency line on 0800 111 999. They are available around the clock. Do not go back in until you are told it is safe. And please, do not try to find the leak yourself first.

What is a Gas Safety Certificate?

It is a written record that a qualified engineer checked your gas appliances and pipework and found them safe. Often called a CP12. The Gas Safe Register has a clear explanation of what the check actually covers if you want to know before you book.

Do landlords need a gas safety check each year?

Yes. Regulation 36 of the Gas Safety (Installation and Use) Regulations 1998 covers most rented properties across Great Britain. You need the record, you need to share it with your tenant, and you need to keep a copy. Set a reminder every year. It is one of those things that is easy to stay on top of until suddenly it is not.

Can you install a gas cooker I bought online?

Yes, as long as the cooker suits your gas supply and the connection point is safe to work from. KB Heating & Plumbing has fitted many cookers bought online. Send the model first and KB Heating & Plumbing will confirm it suits your supply.

Can you fit a gas hob during a kitchen refit?

Yes. Our strong advice is to get it done before the worktop goes down rather than after. We have squeezed into enough finished kitchens to know it is a much better job when there is room to work properly.

Why does my gas appliance keep turning off?

Usually airflow, a safety sensor, or pressure. All fixable but you need a proper check to know which one. Resetting it over and over is not the answer.

What is gas leak detection and how does it work?

It is a set of checks with proper equipment to find exactly where gas is escaping. Once it is found, we make it safe and confirm the system is clear before anything goes back on.

What is a tightness test on a gas line?

Controlled pressure goes into the pipework and we check whether it holds. If it drops, there is a leak. Clear pass or fail, and we tell you what comes next.

Do you cover all areas of Cardiff

Yes. Roath, Canton, Pontcanna, Cathays, Llandaff, Grangetown, Splott, Cardiff Bay, Pontprennau. KB Heating & Plumbing covers all of Cardiff, plus Penarth, Caerphilly and the Vale of Glamorgan.

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Book a Gas Engineer in Cardiff

If you need a gas engineer in Cardiff, just drop us a call or message. Tell us your address, what the appliance or job is, and what you have noticed. We will tell you what the next step is and get something booked in.