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Tricky Boiler Installations:

Difficult, long, inaccessible boiler flues & new gas pipe runs for new boiler installations in South & West London

London properties, particularly those within the extended ULEZ zone, are much more likely to pose new boiler installation obstacles and challenges than properties further out, whether that be suburbs, smaller towns, villages or countryside.

This is generally a result of trickier access due to the age and configuration of properties – Access to the boiler flue, the gas pipework running through the property or the fabric of the building and the position of the gas meter. And locating the water stopcock. As London properties are tight for space, often terraced or flats several stories up this means getting to the outside of the building where the flue exits can be far from straightforward.

Lots of London’s Victorian properties and mansion blocks have been altered, renovated, re-fitted, re-decorated, had lay-out changes, you name it, over the last 100+ years of their existence so that locating where essential supply pipes are and how they can be accessed and worked on can often prove a challenge.

Some property owners have no idea where their main stopcock is, whether they share it with other properties in the block, whether it actually works or if they have the tools to get to it and turn it. There are still plenty of old buried lead mains with seized valves and stopcocks on lurking under London streets and in London cellars or basements.

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WPJ Heating have been rising to this challenge for over 20 years
in SW, SE and W postcodes in the capital.

Hidden and boxed in gas & water utility supply pipes are our speciality.
Restoring and updating Victorian plumbing so that it is safe and functional for modern city living.

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New Flue Installation

All gas boilers need servicing and maintenance over their lifetime and they also will eventually need replacing at some point too. All new boilers must have a new flue installed too. So flue access is paramount. Due to space constraints and home-owners wanting to maximise the available space in their premises, we encounter boilers tucked away and hidden in the most inappropriate spots – in tight concealed high level voids and loft eaves, behind panelling or right at the back of kitchen corner units under worktops. It’s then up to us to service and check them for safety which means getting up and in to find and trace them. We can then advise the customer accordingly.

Installing a new flue for a boiler in such positions can also be challenging. The flue may run through concealed voids that require opening up or may exit high up the building meaning a scaffold or special techniques are needed to reach it, replace it and make sure it is weatherproof externally. They may also run up old chimneys or through other people’s flats – both of which can mean potentially dangerous situations.

The gas meter or water stopcock feeding many London properties may be hidden or remote. Again we are experts in locating these. Meters may be in different parts of the block, in car ports or locked basements, or in under street vaults. Liaising with property management and porters to help locate them is a common occurrence for us.

We are experts with all of this!

We even use rope access and abseilers on the exterior if needs be. Access to other neighbouring properties is a further challenge we face. Rear gardens belonging to a flat underneath the property may need to be accessed so we can get ladders through or make good any building fabric that needs addressing.

Lots of new boiler installations need adjustments, alterations or upgrades to the old gas pipe serving the appliance. New boilers combust and use gas in a different way and this often means we need to run new sections of gas pipe up through the property from the gas meter to the boiler. This again takes experience and know how to carry out in the least disruptive way possible if drilling through rooms, communal hallways, up the exterior of buildings. We aim to minimise any making good or re-decoration required by the homeowner.

  • We have a tried and tested solution on hand for pretty much all scenarios as there’s not much we haven’t seen given the 20,000 London homes we have worked in so far.
  • We have completed 5000 London new boiler installations and still look after many of those happy 5000 customers.
  • Lack of parking proximity to the job, traffic wardens, red routes, ferrying heavy tools and equipment in to premises, organising deliveries to site are all part of the job no matter if flats and apartments are high up in buildings with no lifts.
  • We are your central London new boiler specialists.
  • We are the go-to experts for overcoming taxing plumbing and heating jobs in London’s older properties.

The complexity of these jobs in London should not be overlooked. Even when the actual boiler replacement is straightforward enough, there will likely be several unusual and unseen peripheral parts that we will overcome.

We always carry out an in person site survey to make sure we don’t miss anything. This sets us apart from online companies who may only do with online surveys and who are much more likely to be tripped up or caught out. This all causes delays, hassle and extra cost for the home owner. Better to choose WPJ as the right company for the job in the first place.

Read more about us and how we work

We Offer Up To 12 Years Guarantee on all Worcester Boilers

Why choose a Worcester accredited installer?

WPJ Heating’s boiler guarantee is unbeatable – Up to 12 years guarantee – Our company is a top level WAI – Worcester Accredited Installer. Worcester Bosch trains us and trusts us to install their products exactly like they intended. We can therefore give you up to 12 years guarantee on all Worcester Bosch boilers.

Fully trained independent Worcester specialists
Extended guarantees for extra peace of mind
Gas Safe Registered
Worcester Bosch Accredited

Accredited Installers

We are your local accredited installers in SW London for boilers by global industry leaders Worcester Bosch
and Vaillant. Here some popular boiler manufacturers we work with and install:

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See what our customers have to say about us…

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Polly Newall profile picture
Polly Newall
09/06/2025
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Professional, efficient, reliable, and did a great job on my boiler installation. It was a relief as a boiler installation is a massive investment and you need to trust the people/ company doing it and WPJ Heating exceeded expectations. The plumbers were also very friendly (and patient with my questions!)
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Marianne Crowe profile picture
Marianne Crowe
09/06/2025
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The radiator was leaking I rang for a plumber I was told it would 30 minutes to send someone it was exactly 30 minutes the two guys who came were friendly and explained everything enough for my elderly mother to understand very happy with the service.
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Owen Wilson profile picture
Owen Wilson
09/06/2025
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I recently had a new boiler installed- having got an extortionate quote from British Gas, I opted to try out WPJ. They installed the same unit for a much more competitive price. My engineer was exceptionally pleasant to deal with, highly professional and worked cleanly and promptly. I will be recommending WPJ to any friends or family who may need their services. Very courteous and professional company to deal with. Great work!
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martin walker profile picture
martin walker
18/05/2025
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WPJ Heating recently installed a combi boiler for me. The installation proved more tricky than expected; I was kept fully informed and the issues were solved. The overall service was professional and friendly.
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Nic Doherty profile picture
Nic Doherty
17/05/2025
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Outstanding Plumbers - we had an ASHP, 11 new radiators and extensive new pipework installed by WPJ's and couldn't be more pleased. Will, Valdi, Igor, Kevin, Reece were all fantastic - friendly, respectful, highly competent and really responsive to our questions. Will kept us informed throughout, handled problems with suppliers on our behalf wonderfully and was just generally on hand for everything. We won't be using any other plumber again!
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Fiona Geddes profile picture
Fiona Geddes
02/05/2025
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Very happy with the replacement of my tank and pump. Skilled and pleasant engineers with good communication from the office at a reasonable price.
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Lucy Brookes profile picture
Lucy Brookes
29/04/2025
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From the initial and highly professional onsite inspection by PJ to speaking with Indy in the office who was incredibly efficient and reliable in his communication (going through the process of choosing the right boiler / organising the schedule etc) I knew I was in safe hands. The engineers did a great job fitting a lot of new accessories (due to updated regulations) and turned up very promptly on the day - calling in advance. I’m thrilled with my new boiler & heating system. There was a minor hiccup but it was rectified quickly and generously by the company. Competitively priced and trustworthy I really wouldn’t hesitate to recommend them to anyone - especially in the SW London area. Very glad I found them!
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Maxwell Dixon profile picture
Maxwell Dixon
27/04/2025
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Emailed regarding a boiler service which was booked in very quickly, very polite engineer and all round good service
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Julia Tate profile picture
Julia Tate
26/04/2025
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WPJ Heating installed a Combi boiler from old conventional system. The engineers are very high skilled professionals. They completed job on tight schedule, kept the place tidy and patiently explained to my tenants using the new control. I’m glad to have used them again.
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David Firn profile picture
David Firn
13/04/2025
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
WPJ replaced our boiler. Very happy with all aspects from initial survey to fitting.

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