Project Overview
This case study covers two separate projects carried out by Plumb London for a residential client in Enfield, EN1. The first, completed in March 2026, was an annual service of the client’s Vaillant ecoFIT Pure 830 combination boiler. During that inspection, our engineer identified a below-threshold gas supply pressure at the meter, a safety issue entirely unrelated to the boiler itself, and took immediate action to have it formally rectified through the appropriate network provider.
The second project, quoted in May and delivered across two days in June 2026, involved the complete plumbing and installation of a new dishwasher in the client’s kitchen. This included new supply and waste pipework, cabinet alterations, drainage modifications, and full appliance commissioning. Both projects were completed to a high standard and to the client’s satisfaction.
The Client’s Brief
For the boiler service, the client wanted an annual health check to confirm the appliance was operating safely and efficiently. No concerns had been reported before the visit.
For the kitchen project, the client needed all plumbing works completed ahead of the dishwasher installation. Their requirements were:
New water supply and waste pipework routed to the chosen appliance position
- Full integration within the existing kitchen layout, with minimal visual disruption
- Removal and modification of an existing cabinet to create the required recess
- Connection to the existing drainage system
- Installation of a customer-supplied appliance, with all connections fully tested and confirmed leak-free
Our Survey & Recommendations
During the boiler service in March 2026, our engineer carried out a full inspection of the Vaillant ecoFIT Pure 830, a three-year-old combination boiler with no reported faults. The appliance was confirmed as operating in line with manufacturer installation standards.
However, a gas pressure check at the meter returned a reading of 17.45 mbar, below the 19 mbar minimum required for safe and efficient operation. This type of fault sits upstream of the boiler entirely and is the responsibility of the gas network provider.
Our engineer issued an At-Risk notice in line with Gas Safe obligations and contacted Cadent Gas directly to report the faulty pressure regulator, logging the issue under reference 3006292534. The client was kept fully informed throughout.
For the kitchen works, we carried out a dedicated site visit to assess the layout, confirm the dishwasher position, and establish the most practical routing for new pipework and waste connections. A detailed written quotation followed for the client’s review.
Planning & Preparation
Following the kitchen survey, the client took time to review the quotation before confirming their instruction to proceed, entirely standard for domestic plumbing projects, and our team remained available throughout to answer questions. Once approved, the works were scheduled for 25 and 26 June 2026, with parking arrangements at the property confirmed in advance to ensure an efficient start on both days.
The Work We Carried Out
Boiler service, 20 March 2026
- Carried out a full annual service of the Vaillant ecoFIT Pure 830 combination boiler
- Confirmed the boiler was operating in line with manufacturer installation standards
- Checked gas pressure at the meter and identified a reading of 17.45 mbar, below the 19 mbar minimum
- Issued an At-Risk notice in accordance with Gas Safe regulations
- Contacted Cadent Gas directly to report the faulty pressure regulator (ref 3006292534)
- Advised the client of all findings and next steps
Kitchen dishwasher installation, 25 to 26 June 2026
- Isolated relevant water supplies and completed all preparatory works
- Removed the existing cabinet beneath the worktop to create the required appliance recess
- Altered kitchen units to accommodate the new dishwasher position
- Installed new water supply pipework, routed to the appliance location
- Installed new waste pipework and connected it to the drainage system
- Provided access to the gully connection and altered drainage arrangements as required
- Cored and routed services through the wall where required to facilitate connection
- Installed and positioned the client-supplied dishwasher
- Completed and tested all final plumbing connections
- Tested appliance operation and confirmed all connections leak-free
- Left the work area clean and tidy, and removed all associated waste materials
A formal written testimonial was not obtained for this project. The client was satisfied with the outcome of both visits and remains a valued customer of Plumb London.
Timeline & Completion
The boiler service was completed as a single visit on 20 March 2026. The kitchen installation was carried out over two days on 25 and 26 June 2026, in line with the programme agreed at booking. Both phases were delivered on schedule and without disruption to the client.
Challenges & How We Solved Them
Below-threshold gas pressure at the meter
What began as a routine annual boiler service revealed a gas supply pressure of 17.45 mbar at the meter, below the 19 mbar minimum threshold. Although the boiler itself was functioning correctly, a sustained under-pressure supply can affect performance over time and, more importantly, presents a recognised safety concern. Our engineer acted without hesitation: an At-Risk notice was issued and Cadent Gas was contacted the same day to arrange rectification of the faulty pressure regulator (ref 3006292534). This is exactly why a thorough annual service matters, issues that originate outside the appliance can still be identified and escalated before they become a bigger problem.
Kitchen layout constraints
Domestic kitchen installations rarely follow a standard template, and this project was no exception. The existing layout needed careful assessment to identify the optimal dishwasher position, the most efficient pipework routing, and the extent of unit modification required. We addressed this at survey stage, planning the works thoroughly and communicating transparently with the client about the possibility of a minor projection from the unit line, a common outcome given the spatial constraints of many London kitchens. Clear communication at the outset meant no surprises on the day.
Working with a customer-supplied appliance
The client chose to supply their own dishwasher for installation. Our team connected and commissioned it to exactly the same standard as any manufacturer-supplied unit, with all connections tested before leaving site. Clients supplying their own appliances are advised in advance that product registration and warranty compliance remain their responsibility, a point we’re always clear about, and one that protects the client as much as us.
The Finished Result
The boiler service confirmed that the Vaillant ecoFIT Pure 830 was in good working order for its age. Identifying and promptly escalating the gas pressure fault meant a potential safety issue was resolved before it had any impact on the household. Without a thorough inspection, this fault could have gone undetected for some time.
The kitchen installation was completed neatly across two days. New supply and waste pipework was cleanly integrated within the existing layout, the dishwasher was correctly positioned and connected, and the appliance was fully tested before handover. The client was left with a functional, well-finished installation, a tidy work area, and a kitchen noticeably better equipped than when we arrived.
Project Investment
The kitchen dishwasher installation was completed at a project value of £2,500 plus VAT, covering preparatory plumbing, new supply and waste pipework, cabinet modifications, drainage alterations, appliance fitting, and comprehensive leak and operation testing.
The annual boiler service represents a routine but important recurring investment in the safety and longevity of the heating system, and on this occasion it returned significantly more value than the service itself by identifying a gas supply fault that needed immediate attention.
Why Choose Plumb London
- Gas Safe registered engineers with extensive residential and commercial experience
- We look beyond the obvious. Our engineers check the full picture, not just the job in hand
- Transparent communication at every stage, from survey through to sign-off
- Prompt, correct action when safety concerns are identified, no hesitation, no shortcuts
- Consistent, tidy workmanship with a full clean-up on completion
- A strong base of returning clients who trust us to look after their homes year after year
- Family-owned and operated. We stand behind our work and our reputation
Frequently Asked Questions
How often should I have my boiler serviced?
We recommend an annual service as a minimum. Regular servicing keeps the appliance running efficiently, helps maintain your warranty where applicable, and, as this project demonstrates, gives a trained engineer the opportunity to identify issues that may not be obvious to the homeowner. All gas work must be carried out by a Gas Safe registered engineer.
What is an At-Risk notice, and what happens next?
An At-Risk notice is issued by a Gas Safe registered engineer when a gas installation is found to be in an unsafe condition. In this case, the issue was identified at the gas meter, an upstream fault outside the boiler, and was referred immediately to Cadent Gas, the network provider responsible for the infrastructure. Issuing an At-Risk notice is both a legal requirement and the right course of action to protect the occupants of a property.
Can you install a dishwasher I have already purchased?
Yes, we install customer-supplied appliances regularly. Our team carries out all associated plumbing works and connects the appliance to the same standard as any other installation. We ask clients to note that we’re unable to offer guarantees on goods supplied by the customer, and that product registration for warranty purposes remains the client’s responsibility.
How long does a dishwasher installation typically take?
It depends on the scope of the plumbing works involved. A like-for-like swap of an existing appliance is often achievable in a single day. Where new pipework needs to be run, drainage altered, or cabinetry modified, as was the case here, we recommend allowing two days to make sure the work is done properly and without compromise.
Customer Testimonials
Don’t just take our word for it, here’s a selection of the latest reviews. You can view more here.
Excellent service by Plumb London, fixed two bathroom related issues in a couple of days - clear communication and good management of expectations in terms of works and timeline, which I always apprec..Read More
Sandra Obradovic
Really happy with the service from Plumb London for my toilet repair. We're quick to attend and Charlie was very knowledgeable, getting the specific part needed and even providing advice on some other..Read More
Darren Phillips
Plumb London were brilliant from quote to completion. Firstly, they are very competitively priced and I had very little hesitation going with their quote for a new boiler. I was also really impressed ..Read More
Ashley Watkinson
Our boiler was leaking and Nicola fixed it the day it happened. Highly recommended!
Kathy Weston
Brilliant service, friendly engineer and a job completed quickly and tidily. I would use the company again if I ever need to. Swanscombe, Kent
Collin Best
Plumb London were able to come quickly and fix my problem without fuss, quoting a sensible price.
Robert Slater
My toilet seat was broken and previous plumbers I contacted told me it was a non-standard toilet and I had to get a new toilet. I invited over Plumb London and they told me that the toilet seat can be..Read More
Geoffrey Payne
Plumb London provided excellent service from start to finish! The boiler installation was quick, tidy, and professionally done. A year later, the same engineer carried out an efficient and thorough ma..Read More
George Ezeanaka
Fantastic experience all around. The customer service team at PlumbLondon is not only responsive and super-friendly, but actually take initiative - we had our job done a day early because a team membe..Read More
Eleanor Franzén
Plumb London carried out a boiler and gas safety check for me. They were quick to get booked in, the team were polite and professional, and their pricing was more competitive than others I contacted. ..Read More
Louise Kaufhold
A Five Star service. The range of skills and craftsmanship displayed by Mounir were incredible. Would recommend to anyone with dreams of creating a Dream Kitchen. With this Team, it’s not just possi..Read More
Trevor Beattie
Easy to communicate with and quick work to solve the problem we had
Josh Evans
Excellent service from start to finish, everything was handled professionally and efficiently. Communication was clear throughout, and Louise did a great job coordinating everything and keeping me in..Read More
Claire Willis
Plumb London were brilliant. Stephan turned up on time, was very personable and was very efficient. Would definitely recommend and will be using again in future.
Eleanor Rider
For the second year in a row, the lovely Mo serviced our boiler. He was on time and provided a super thorough service. I would really recommend Plumb London as your plumbing company. 5 stars all round..Read More
Dianah Jane Coleman
Very fast service. We got our boiler changed as an emergency a year ago, and got service this year. Both times Plumb London were booked within 24h of being called, with the team taking good care of en..Read More
Alexandra Fleming
Great professional service from start to finish. The team did an excellent job installing a Powertank and paid close attention to detail throughout. I’ve used them a couple of times now and have alw..Read More
Kevin Senior
Absolutely exceptional service. Cannot recommend enough. Polite, attentive and understanding of the situation. Par and Stephan who attended my property were courteous and professional, making the horr..Read More
Max Hurd
I can’t fault the service I received. Prompt, courteous and so accommodating. It’s so easy to be ripped off, PlumbLondon are overwhelmingly decent, thorough and reliable. A million percent recomme..Read More
Kate Comer
Amazing job the works is done very professionally I will not hesitate to use your company again and recommend to friends.
Renato Balane
Fantastic service, efficient and easy to organise. Reliable and fair pricing
Jane Renton-Rose
Very professional and comprehensive service.
Stuart Highley
Fast service (next day) for the initial assessment of the issue. Then, even though it was not an emergency per se (needed broken shower pump replaced and associated inter-connecting pipe work), the te..Read More
Jeff Smith
a five-star service
David Akers
I had a great experience with Plumb London. They came out quickly to inspect an issue with my water tank, identified the problem right away, and got everything sorted efficiently. The engineer was pro..Read More
Patrick Fuller
Delighted with the service from Plumb London on a number of occasions. Very reliable and professional.
Thomas Jacques
good job well done boiler replacement
Deirdre Bell
Excellent service from engineer who attended to change kitchen tap. Punctual, courteous and knowledgeable. Got the job done despite an unexpected issue with some complex piping (resolved on the spot)...Read More
Constantia Smith
Contacted Plumb London hi Charlie, come round and give me a quote within days. Carried out. I ordered all the parts and even matched The new tiles with the existing. Hardly recommend them very profess..Read More
Vimal Sharma
Very professional. The work was carried out efficiently and quickly.
matt o'neill
Amazing job the works is done very professionally I will not hesitate to use your company again and recommend to friends.
Renato Balane
Fantastic service, efficient and easy to organise. Reliable and fair pricing
Jane Renton-Rose
We recently worked with Plumb London at AKA Marylebone and were extremely impressed with their professionalism and technical expertise. The project involved complex plantroom systems and ongoing comm..Read More
shellie-ann delaney
Excellent service. I've used Plumb London multiple times and they're always professional (they pick up the phone and arrive when they say they will). For example, my boiler had been leaking but only o..Read More
Sebastian Robinson
The initial consultation from Plumb London was excellent, and then a call received quickly do explain a detailed quote. The appointment for the work was quick and the work to the bathroom carried out ..Read More
Nick M
Had a new boiler installed 4 years ago, best decision. They have looked after it well and every service is efficient, quick and easy. They are fantastic to book with, always answer the phone and any i..Read More
Milly Smith
Big thumbs up for Plumb London, in particular the engineer (Andrew) who visited the property where my elderly mother lives. A gentle manner and patient approach was exactly the level of kindness that ..Read More
Patrick Totty
Prompt and efficient service from Plumb London. A clear and comprehensive quote was provided and the job was completed well. Our ancient boiler completely stopped working and they were able to visit t..Read More
Simone Thomas
Plumb London were absolutely incredible. We were in an emergency situation, and Jack did everything he possibly could to get a new boiler out to us as quickly as possible. He also liaised directly wit..Read More
Lily Macpherson
Fabulous and prompt service. Kept up to date; great communication.
Paula Kennedy
Great job, quick efficient and fair price
Daniel Dean
Delighted with the service from Plumb London on a number of occasions. Very reliable and professional.
Thomas Jacques
The service from Plumb London was prompt and they have solved the problem as I have still not had a complaint from my tenants It was very easy to deal.with the staff at Plumb London.
Shubha Kasbekar
Excellent service from engineer who attended to change kitchen tap. Punctual, courteous and knowledgeable. Got the job done despite an unexpected issue with some complex piping (resolved on the spot)...Read More
Constantia Smith
Excellent service by Plumb London, fixed two bathroom related issues in a couple of days - clear communication and good management of expectations in terms of works and timeline, which I always apprec..Read More
Sandra Obradovic
Really happy with the service from Plumb London for my toilet repair. We're quick to attend and Charlie was very knowledgeable, getting the specific part needed and even providing advice on some other..Read More
Darren Phillips
Contact Plumb London
If you are facing a plumbing, heating, boiler or drainage issue in London, do not hesitate to get in touch with Plumb London. Our friendly and knowledgeable team is ready to assist you with all your plumbing needs. Reach out to us today to schedule a consultation and experience the difference with Plumb London.
