These reviews are published independently on the named public source below, not testimonials this business chose to show. We bring them together and link each one back to where it appeared, so you can open the source and read it yourself.
5.0out of 5
115 reviews in public evidence9 reviews in the last 12 monthsReviewed on public review sources since 2023Most recent review
Customers often mention
ProfessionalMentioned in 32% of reviews we've read
Where these reviews are published
Which? Trusted Traders115 reviews · 5.0 avg
Detailed reviews
These are the individual reviews we hold for Alan Mack Plumbing & Heating Services, including the highlights above. The 115 headline total is the review volume reported across public review sources.
Customer in Greater London
Customer recommends this business
New Worcester Bosch Combi Boiler 32CDI
My hot water cylinder was leaking at the flange connection. I called Alan out, he came straight away, but unfortunately the slow leak at the cylinder could not be fixed. As I had a 49 year old, heavy cast iron floor mounted boiler with gravity hot water, and a cold water tank & header tank in the loft, Alan explained my various options and I decided to go ahead with a new Worcester Bosch Condensating Combi boiler which did away with the hot water cylinder + tanks in the loft giving me more storage space. It was a big job, changing over all the pipework from gravity hot water to mains pressure hot & cold water. Alan carried out all the work very neatly, using a laser level to ensure each pipe was perfectly vertical. Alan flushed through all my radiators cleaning out years of black sludge that had accumulated before connecting my new boiler. Corrosion Inhibitor and a new magnetic filter were added to the system to keep the water clean. Alan completed all the work to a very high standard, with minimal mess, within the timescale and costs quoted. Alan is a very pleasant and friendly man to deal with. I now have the benefit of a 10-year guarantee on the new boiler, justs needs an annual service to remain active. I have no hesitation in recommending Alan for any plumbing or heating work, he is simply the best.
Scores listed by Which? Trusted Traders
Customer Service
5 / 5
Quality
5 / 5
Value
5 / 5
Customer in Greater London
Customer recommends this business
The second time I have used this plumber
What can I say? I used Alan a year ago and he was first rate in all aspects. Time keeping, knowledge, hard work and accurate costing were the names of the game a year ago when he sorted my hot water system out. Today he sorted out my boiler and radiators. He is a treasure!
Scores listed by Which? Trusted Traders
Customer Service
5 / 5
Quality
5 / 5
Value
5 / 5
Customer in Greater London
Customer recommends this business
Professional and Reliable.
Alan was knowledgeable and helpful. He was flexible and discussed my options helping me to arrive at the best solution for me. Work was done neatly and on time. I'm very happy with the result.
Work completed:
Scores listed by Which? Trusted Traders
Customer Service
5 / 5
Quality
5 / 5
Value
4 / 5
Customer in Greater London
Customer recommends this business
Super helpful
Alan helped fixing the issue with my boiler kept dropping pressure. He started with diagnosing the issue and ruling out external factors. Then he explained everything in detail followed by useful suggestions. He then applied the fix, now it’s hassle free. I would highly recommend Alan as your gas engineer to go.
Work completed:
Scores listed by Which? Trusted Traders
Customer Service
5 / 5
Quality
5 / 5
Value
5 / 5
Customer in Greater London
Customer recommends this business
Installed new Worcester Bosch boiler
Alan and his assistant Fred installed a new Worcester Bosch boiler for us. Alan communicated clearly ahead of the job and completed the job to a high standard for a fair price. He flushed the system and installed the new boiler, system filter and Hive mini thermostat. He had to rework some of the pipes and fit a new flue and condensate pipe to the outside of our first floor flat. He also fixed our towel radiator which had been installed incorrectly. He understood our requirements and clearly explained everything in simple terms. Finally he made sure everything was working and that we were happy before he left. Highly recommended.
Work completed:
Scores listed by Which? Trusted Traders
Customer Service
5 / 5
Quality
5 / 5
Value
5 / 5
Read the other 15 detailed reviews on this pageShow fewer reviews
Customer in Greater London
Customer recommends this business
A tricky job
I booked Alan to carry out a powerflush on our old and neglected central heating we inherited with the house. I knew it was not going to be straightforward and so it proved. Alan was with us almost the entire day fixing one issue after another, but at the end of the day we have heating and hot water. Alan was professional throughout and talked me through the various problems and solutions. Although he was with us much longer than expected the agreed fee remained the same. I would definitely recommend Alan Mac for plumbing and central heating work.
Work completed:
Scores listed by Which? Trusted Traders
Customer Service
5 / 5
Quality
5 / 5
Value
5 / 5
Customer in Greater London
Customer recommends this business
My New Go to Plumber
My central heating had stopped working. I found Alan via Chat GPT, having asked for the names of plumbers with the best reputations in West London. He was the first on the list it generated. He came when he said he would, was very personable and identified and fixed the issue (including having to go to buy the new part required) quickly. He also fixed a couple of radiators that weren't heating as they should without charging any me anything extra for doing so, even though he had to use a new valve on one of them. His good reputation is fully justified and I will now automatically default to using him in future should the need arise.
Work completed:
Scores listed by Which? Trusted Traders
Customer Service
5 / 5
Quality
5 / 5
Value
5 / 5
Customer in Greater London
Customer recommends this business
Installation of a new heating system
Alan, planned, sourced, and communicated, with a third party,as to the installation of a new boiler in my home. All completed in two days, also added a radiator, in my rear extension, which made sense. Knowledgeable,reliable,and helpful in explaining, in layman’s terms, your options. Recommend him, wholeheartedly,to all. You won’t go wrong.
Work completed:
Scores listed by Which? Trusted Traders
Customer Service
5 / 5
Quality
5 / 5
Value
5 / 5
Customer in Greater London
Customer recommends this business
Excellent service!
Boiler serviced, whole heating installation checked and ok’ed for the season. Alan is amazing; attention to detail, patience and honesty. Kindly explained all the details making sure we understand the nuances of the installation. Softly spoken gentleman, trustworthy and reliable. I recommend!
Work completed:
Scores listed by Which? Trusted Traders
Customer Service
5 / 5
Quality
5 / 5
Value
5 / 5
Customer in Greater London
Customer recommends this business
Great expertise and Great Job
Thank you, Alan! You provided great service from the initial call to the boiler fitting. All our questions were answered with clarity. Alan has great knowledge of his trade and is a specialist. We are very happy with the installation, the work is very neat and tidy, and everything is running smoothly.
Work completed:
Scores listed by Which? Trusted Traders
Customer Service
5 / 5
Quality
5 / 5
Value
5 / 5
Customer in Greater London
Customer recommends this business
Heating System Upgrade
Alan was recommended to us. The task was to upgrade our heating system by adding a new pump to increase pressure and a new boiler. Together with 3 new radiators and fitting new valves and brackets to existing vintage radiators. From the initial conversation you got a good feeling that this was a really professional service. The initial call and quote was very thorough. The work itself was performed on time and too budget with due consideration to additional costs, agreed in advance and with recommendations. Post completion we received a detailed set of short videos and a final debrief call for questions. Exceptional work and service overall.
Work completed:
Scores listed by Which? Trusted Traders
Customer Service
5 / 5
Quality
5 / 5
Value
5 / 5
Customer in Greater London
Customer recommends this business
New Boiler
What can I say, a tradesman who absolutely knows his job inside out. My old boiler was installed by cowboys and we have had nothing but problems, then comes along Alan. Wow he really knows his stuff I highly recommend this guy,he is patient and explains everything so well. We had so many issues to correct from the old boiler installation and it was not a problem I will say again best tradesman we have ever had Thank you Alan
Work completed:
Scores listed by Which? Trusted Traders
Customer Service
5 / 5
Quality
5 / 5
Value
5 / 5
Customer in Greater London
Customer recommends this business
Fantastic Service - Very Happy to Recommend
Called Alan as we needed our boiler and central heating system serviced and a radiator thermostat replaced. Within a week the work was completed and we now have a boiler working as if it was new and radiators working efficiently, he kindly was even able to provide the replacement radiator thermostat without charge. Throughout Alan’s communication, advice and knowledge has been exceptional and the quote for the work was one of the most reasonable we received.
Work completed:
Scores listed by Which? Trusted Traders
Customer Service
5 / 5
Quality
5 / 5
Value
5 / 5
Customer in Greater London
Customer recommends this business
A real find!
Having been endlessly mucked about by a local plumber who did not have a Drayton Motorised Valve and said it had to be specially ordered in, I found 12 such valves available for collect at various local plumbers' merchants around me! Having waited two days, I called Alan and he came over straight away, fitted the valve and checked the system. I thoroughly recommend this very efficient and helpful man
Work completed:
Scores listed by Which? Trusted Traders
Customer Service
5 / 5
Quality
5 / 5
Value
5 / 5
Customer in Greater London
Customer recommends this business
Great work and helpful
Alan installed my new boiler, water filter, and faucet. He provided valuable advice on the best parts for my needs, demonstrating his expertise and attention to detail. He completed the work to an exceptional standard and displayed extensive knowledge throughout. I highly recommend his services to anyone in need.
Work completed:
Scores listed by Which? Trusted Traders
Customer Service
5 / 5
Quality
5 / 5
Value
4 / 5
Customer in Greater London
Customer recommends this business
Job well done
My old boiler needed replacing, so I got a few quotes to get a sense of the cost and work involved. I chose Alan because when he visited to give an estimate, he struck me as an affable, knowledgeable professional. Also, I appreciated him giving a detailed explanation & costings of what the job entailed. Alan patiently and politely answered any questions I had and later sent me a detailed written estimate of all that had been discussed. On the agreed starting date for installing the boiler, Alan arrived on time, worked very hard throughout the day and tidied up when he was finished. Despite it being a long day’s work, Alan took time to double-check the boiler and radiators, making sure everything was in good working order before he left. I am pleased with his work and would be happy to recommend him.
Scores listed by Which? Trusted Traders
Customer Service
5 / 5
Quality
5 / 5
Value
5 / 5
Customer in Greater London
Customer recommends this business
Professional and patient
Alan went above and beyond in helping me get the correct heating system. After picking Alan from a few other engineers he came on the day that was agreed He installed a new Worcester combi boiler along with 4 new radiators. He recommended a towel rail which I'm very happy with as it uplifts the bathroom. On completion, I was extremely happy with his workmanship and left the property tidy I'm really impressed with Alan putting back a tiled boxing better than originally as other plumbers said they would need to smash it out to get to the pipes I would 100% recommend Alan
Scores listed by Which? Trusted Traders
Customer Service
5 / 5
Quality
5 / 5
Value
5 / 5
Customer in Greater London
Customer recommends this business
New Boiler & Megaflow Install
Alan was a very knowledgeable Heating engineer, he wasn’t the cheapest, but as they say, you get what you pay for. From the start to finish I have no complaints, when he visited my house 1st time, we set and I went through my requirements and problems, and he gave me a quote with recommendations, he spent well over discussing my requirements. When i was ready, I called him again, and he spent good amount of time explaining everything in details. While installing the boiler, he came across poor wiring and he sorted that out for me without additional charges, it did take him good few hours to sort the wiring. He also sorted out my old piping in the roof which looked like cobweb, but he sorted that out too, his piping skills are to be admired. Throughout the install he asked if I was happy with the progress of the job, also each day he would clear up all the mess before leaving for the day. Overall he is a excellent central heating engineer, and it was a pleasure picking the right person for the job, I would recommend Alan to anyone.
Work completed:
Scores listed by Which? Trusted Traders
Customer Service
5 / 5
Quality
5 / 5
Value
5 / 5
Customer in Greater London
Customer recommends this business
Job done successfully
I had a leaking pipe. I got a number of names from Which and he got the highest rating. I chose him and booked an appointment with him for Monday. He came and explained to me the situation and the possible options, wishing to give me the best price for the job. He then did the repairs very successfully. I was very pleased with his work and told him that I would give him 5+ stars if it was possible to do so. Thank you for a job well done Alan.
Work completed:
Scores listed by Which? Trusted Traders
Customer Service
5 / 5
Quality
5 / 5
Value
5 / 5
Customer in Greater London
Customer recommends this business
Exceptional service
Initially contacted Alan about removing a radiator and replacing it with a vertical one. When he initially visited he inspected the whole heating system and helped me to make an informed decision about replacing the boiler and all the radiators which were old and on borrowed time. I also asked him to fit a new kitchen sink, tap, bathroom vanity unit and shower screen. He helped me decide on a new kitchen sink and tap and supplied a shower screen at a highly discounted price. The work was completed to the highest standard on the agreed dates and for a fair price. Most importantly, Alan is a very genuine, engaging and knowledgeable person who you can trust and feel comfortable being in your home. He went above and beyond to make sure the job was done properly and explained everything clearly. He always kept me updated with what he was doing and dealt with any issues that popped up. I will use Alan for boiler servicing and any other plumbing and heating work required in the future.
Work completed:
Scores listed by Which? Trusted Traders
Customer Service
5 / 5
Quality
5 / 5
Value
5 / 5
Local context
Rated 5.0, above the local average for plumbers in London
Across 1281 plumbers in London, the typical rating is 4.9 out of 5. We compare against the same businesses a homeowner would find searching for this trade locally.
02
From customer reviews
What customers consistently say
Recurring themes from 25 customer reviews on Which? Trusted Traders.
Respectful and tidy in your home: “tidied up when he was finished” · Which? Trusted Traders, 13 Nov 2024
Reliable and punctualQuoted from 2 reviews
“He came when he said he would” · Which? Trusted Traders, 25 Sept 2025
“Alan arrived on time” · Which? Trusted Traders, 13 Nov 2024
Credentials and associations
Credentials and memberships
1
These credentials and memberships are attributed to named public sources. Check the source before relying on them.
Which? Trusted TraderListed, current status not shown
These sources do not label every image as completed work. The gallery may include projects, people, logos or certificates, so it does not count as completed-work evidence.
Boiler & booster pumps Acton.jpg
Plant room install Acton.jpg
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Hot & Cold pipwork Acton.jpg
Carring out boiler check after install in Ealing.jpg
Underfloor & cylinder Ealing.jpg
Boiler, cylinder install Chiswick.jpg
From Which? Trusted Traders
Opening hours
The hours this business publishes online, handy for knowing when to call. Confirm before you set off.
Monday–Saturday
7am–8pm
03
Sources
Where this information comes from
1 named public source
Everything on this page is drawn from named public sources. Where a source provides a public link, you can open the original and dig deeper.
At Alan Mack Plumbing and Heating, we deliver exceptional service backed by nearly 30 years of experience. As a family-run business, we take pride in offering a range of options and price points for every job, big or small. We specialize in recommending the most cost-effective heating systems for your property, whether it’s a combi, system, or conventional boiler. Our goal is to ensure your heating system operates efficiently, reducing fuel consumption and lowering your bills. We stay current with the latest products and highly recommend Worcester Bosch, Viessmann, and Vaillant boilers. As approved installers, we provide extended warranties of up to 12 years. Our services include: - Boiler replacement, service, and repair - Cylinder installation - Heating controls (Hive, Nest) - Magnetic power flushing - Radiator installation - Booster pumps - General plumbing and gas work - Landlord certificates Please don’t hesitate to call us for inquiries or to schedule a service. Thank you, Alan Mack
Services they list
Central heating systems (installation and servicing)Unvented cylinder installation and maintenanceWater softener installation and maintenanceBoiler installationBoiler repairBoiler servicingRadiators and central heatingPower flushingGas fire repair and servicingImmersion HeatersUnderfloor heatingGas cooker installation
Listed on public sources or the business's own website; check directly that they cover your job before you book.
What this business says about itself
From their own website
What this business says about itself
Insurance: Fully insured
Accreditations it displays. Confirm each is current on the official register before you hire:
These are statements the business makes on its own website, worth confirming in writing (and on the official registers) before you hire, not independently verified by us.
Always confirm credentials and quotes with the business directly before hiring.
Verify at the sourceCheck them yourself
Approved plumbers on the free WaterSafe register are vetted, qualified to the water regulations and insured. Check they're listed, or find a WaterSafe-approved plumber near you.
Agree the call-out fee, the hourly or fixed rate, and whether parts are charged on top, in writing, before an emergency plumber starts. Out-of-hours overcharging and 'while I'm here' add-ons are common complaints.
✓
Be wary of a plumber who, on a first visit, says your whole system or boiler must be replaced. Get a second opinion and an itemised quote (parts and labour separately) before agreeing to major work.
✓
Gas and boiler work is a separate, regulated trade, not general plumbing. Make sure anyone working on a gas appliance is specifically registered to do gas work, and ask to see that registration before they start.
Want an extra legitimacy check? Run the Cowboy Checker on Alan Mack Plumbing & Heating Services before you contact them.
Common questions about Alan Mack Plumbing & Heating Services
Is Alan Mack Plumbing & Heating Services a legitimate business?
Alan Mack Plumbing & Heating Services has 115 independent public reviews, rated 5 out of 5. This is independent public evidence gathered from named public sources (no ads, no paid placement), not a guarantee of workmanship. If anything here is out of date, the business can request a correction.
What do customers say about Alan Mack Plumbing & Heating Services?
Alan Mack Plumbing & Heating Services has 115 public reviews, averaging 5 out of 5. You can read the individual reviews and where each came from in the reviews section above.
How do I know Alan Mack Plumbing & Heating Services' reviews are genuine?
Alan Mack Plumbing & Heating Services' 115 public reviews come from a named public review source, and MyTrustedTraders links every one back to where it was published, so you can open the source and read them yourself rather than trusting a single curated page. MyTrustedTraders brings this public evidence together with no ads and no paid placement: we show where every review came from rather than selling rankings, so you can weigh the evidence for yourself.
Has Alan Mack Plumbing & Heating Services had recent public reviews?
Alan Mack Plumbing & Heating Services has 9 public reviews dated within the last 12 months. That shows their review history includes recent feedback; it does not prove current availability, so confirm capacity before hiring.
Is Alan Mack Plumbing & Heating Services qualified and accredited?
We hold 1 independently sourced credential for Alan Mack Plumbing & Heating Services, including Which? Trusted Trader. Each is attributed to the body that issued it in the credentials section. For example, Which? Trusted Trader is Which? Trusted Trader: an endorsement from the consumer champion Which?, given to traders who pass its assessment process.
Is Alan Mack Plumbing & Heating Services insured?
They state on their own website that fully insured. This is the business's own statement on their website, not something we have independently checked. Ask to see a current certificate before work starts.
What does Alan Mack Plumbing & Heating Services specialise in?
Alan Mack Plumbing & Heating Services lists specialist services including Central heating systems (installation and servicing), Unvented cylinder installation and maintenance, Water softener installation and maintenance, Boiler installation, Boiler repair, Boiler servicing. If your job is one of these, look for it in their listed services or ask them to confirm for your project.
How long has Alan Mack Plumbing & Heating Services been trading?
Alan Mack Plumbing & Heating Services has been reviewed on public sources since 2023.
These describe public evidence MyTrustedTraders held at the stated dates. They are not independent awards, they cannot be bought, and they do not change this business's Trust Score or search position. How milestones are measured