Internal plumbing systems in London properties are often altered over time through extensions, upgrades, and previous repairs. Properties that began with simple, tank-fed layouts are frequently adapted to serve additional bathrooms, kitchens, and higher-demand appliances
In practice, these changes are commonly made by extending existing pipe runs rather than redesigning the system. Original 15mm feeds are branched repeatedly, hot and cold supplies are rerouted to suit new layouts, and older sections are left in place alongside newer installations. Over time, this creates pipework that is poorly routed, undersized, and unnecessarily complex.
As demand increases, the limitations of the original installation become more apparent. The pipework is then expected to supply multiple outlets simultaneously, support modern appliances, and operate under pressure conditions different from those for which it was originally designed. This often results in systems that cannot meet current usage requirements and begin to show consistent performance issues.
Low flow rates, pressure issues, concealed leaks, shared supply arrangements, and outdated or non-compliant installations are all common. In most cases, the underlying problem lies within the pipework itself rather than in the appliances it serves
At London & Surrey Water Services, we identify faults within internal pipework and correct them at source. Typical works include reconfiguring layouts, replacing restrictive or degraded sections, addressing concealed leaks, upgrading cold water storage arrangements, separating shared supplies, and bringing installations into compliance with current regulations.
We are typically called where flow is inconsistent, pressure collapses under demand, leaks are suspected but not visible, or systems cannot be isolated effectively. In many cases, earlier work has been carried out with little regard for overall system performance, leaving constraints within the pipework.
Where pipework is incorrectly sized, poorly configured, or has deteriorated over time, it will impact overall performance. Works typically involve replacing defective sections, reconfiguring layouts, removing redundant pipework, and carrying out targeted upgrades to improve flow and reliability of the system.
Where pipework is undersized, poorly routed, or has deteriorated over time, performance is compromised. Remedial work removes restrictions, simplifies layouts, eliminates redundant runs, and upgrades critical sections so the system delivers stable flow under reliable control.
A focused range of works carried out to identify, correct, and improve internal pipework performance
We are always happy to provide advice and a free estimate without obligation
Take advantage of our limited-time offer and save 10% on all lead pipe replacement works.This discount applies to full supply-pipe renewals carried out by our approved moling contractors.
Not sure whether your property has lead pipes or elevated lead levels in your water? We offer lead content testing to help you assess your risk before committing to replacement works.
If your internal plumbing system is not performing as it should, a proper assessment is the first step towards identifying the cause and outlining the work required to put it right.
Contact London & Surrey Water Services to arrange a visit.
We offer a full range of internal plumbing and supply pipe services including new installations, repair and replacement
We adopt a best practice approach to the work we carry out and ensure compliance with the Water Supply (Water Fittings) Regulations 1999
We have been Water Industry approved plumbers and impact moling contractors for almost two decades, working exclusively on new connections, customer side leaks, and lead replacement
On completion of lead pipe renewals or a water supply pipe upgrade, we issue a certificate of works completed, which can be submitted to Thames Water to progress applications or satisfy enforcement notices.
Our certificates confirm that our workmanship satisfies the requirement of the water regulations. They also act as our guarantee of ten years for full supply pipe replacement and two years for supply pipe repairs.
We've built a solid reputation through our continually growing customer base as the most trusted team of Approved Plumbers and Moling Contractors in London.
We engaged with Alan to have our water main and internal piping replaced as they were made of lead. Alan came and gave us a comprehensive explanation of the work required and how to engage with Thames Water under their lead replacement scheme. He was the only person we could find that was up to handling both external moling and the internal works. Alan spent 2 days in our home completing the work, was polite and extremely unfazed by complications. He managed to reroute the piping under our tiled floor without having to break into it at all. The other reviews are very accurate and I couldn't recommend him highly enough!
After six months of wrangling with Thames Water, an insurance company, a motley collection of leak inspectors, pipe contractors and two plumbers, we still had a mains water pipe unrepaired and leaking under our drive. Alan came over, diagnosed a solution in minutes, and returned within a week to singlehandedly repair everything with care and without fuss. He really knows his stuff, and is wholly professional in his work. If only we had called him six months earlier. His company thoroughly deserves the five stars.
I had a leak and my water had shut down completely but the leak was not visible. The insurance company told me I needed to get someone in to do track and trace which I did and they totally scammed me. I had no water for 3 days and then I found Alan and he came round promptly, located the leak without all this track and trace equipment, took the floorboards up and fixed the leak, water back working — all in under an hour and at such a very reasonable cost. I cannot rate him enough and would highly recommend him.
Alan (aka London and Surrey Water Services Ltd) turned up and made two access points at the water meter and garage. Then with the precision of NASA he used a tunnelling mole and came up bang centre of his target. This was amazing to watch — a distance of over 20 feet with minimal disruption. My new water supply was in, effectively, efficiently and at very reasonable cost since he didn't have to dig up all my drive to find the leak at great expense. No hesitation in recommending Alan. Clive Cox CEng (retired) MEng.
Alan did a fantastic job for us investigating and resolving poor water flow issues to our flat. Other Thames Water approved plumbers were proposing major replumbing with quotes as high as £20k and even charged to quote. Alan proposed replacing the pipework from the road with wider gauge pipe as the first step and the problem was solved for barely a twentieth of that cost. He's clearly an expert at solving domestic plumbing problems and stood out from every other firm we spoke to. Can't recommend enough!
I contacted Alan following a letter from Thames Water advising of a water leak at my property. Having popped over to determine the likely cause, Alan sent through an itemised quote and patiently answered my additional questions. He and Pierce carried out the work in a thoroughly professional and minimally intrusive manner by moling a new pipe under my driveway and installing a new internal stop valve. London and Surrey Water Services combine subject matter expertise, assuredness, clarity, reliability, responsiveness and honesty. They made a stressful incident so much easier to deal with.
We contacted Alan to detect a leak because of which our water bills had been through the roof for several months. He was extremely professional, answered my questions patiently, detected the leak with no interruption to our day and above all, coordinated with Thames Water to repair the leak. He was very prompt in replying to any messages or questions I sent him and voluntarily sent me all the information I needed to claim a leak allowance from Thames Water. One of the best customer service experiences I have had in a long time!
After a disappointing experience with another plumber whose work failed to meet the water company standards, we contacted Alan and we're so glad we did! Alan came to the rescue, immediately identified the substandard installation, and redid the entire lead pipe replacement to a professional standard. He was highly efficient, knowledgeable, and genuinely trustworthy. He explained everything clearly and carried out the work with great care and precision. The difference in quality was obvious. Thanks to Alan, everything passed inspection with no issues, and we finally have peace of mind. Highly recommended!
I first found Alan McBride of London and Surrey Water Services in 2016 after I had no water for weeks and Thames refused to do anything about it. He was unbelievable in his knowledge, his support, going over and above by advocating for me with Thames and getting the problem fixed. 7 years later I called on Alan again and it is inspiring to watch how thorough he is and how his mind works. He worked it out and the fix was simple. He really is quite a plumbing and water specialist genius!
A calm, pleasant and reassuring presence, Alan turned up early for his appointment and made replacing a leaking supply pipe under our Victorian house in West London seem like a simple task, causing the minimum of disruption. He is highly knowledgeable, efficient and professional, and even reduced his already-reasonable invoice because part of his quotation did not need to be done. Honest, conscientious and down-to-earth, Alan is a pleasure to deal with.
I found Alan's details on the Thames Water WaterSafe Approved Plumbers list and chose to contact him because of the amazing reviews he has received on Google. Alan was able to successfully install an internal water stopcock into a Victorian terrace house with very complex plumbing. Alan was very easy to deal with, very hard-working and explained exactly what he was doing. Alan's prices are also very reasonable. I will definitely contact Alan and London and Surrey Water Services for any future plumbing requirements I have. Very highly recommend.
Alan has done a fantastic job replacing our lead mains pipe following an internal water leak. He is helpful, professional and clear providing sensible advice including utilising his great experience and knowledge of working with Thames Water. He is quick to respond to any queries and he works diligently and neatly. To do the final connection once Thames Water were ready, Alan came back to complete the job with no fuss. Really strongly recommend Alan and really pleased we chose him.
Alan was superb from start to finish. From arriving to prepare a quote, doing the work, tidying up and making good and coming back to finish once Thames Water had completed their part of the lead pipe replacement. He helped with the various administration parts of the lead pipe replacement scheme by Thames Water which saved a lot of confusion, providing advice and explanation every step of the way. I would not hesitate to recommend Alan for any other similar work.
Called Alan to investigate a leak at the end of the driveway. He replaced the supply pipe into the house without disturbing the driveway which was a bonus. He was very professional, knowledgeable, personable and helped us submit for the lead pipe replacement scheme with the water company. Regularly checked in with us as the works between himself and water company were coordinated. Highly recommend Alan.
Addressing the pipework faults most commonly found in older London properties, altered plumbing systems and upgraded homes.
Pressure and flow are closely related but not the same thing. A property may have reasonable static pressure yet still experience poor flow when internal pipework is undersized, heavily branched, restricted, or unable to deliver sufficient volume under demand. This is common in older London properties where additional bathrooms or appliances have been added onto original pipework.
This is usually a flow issue rather than a true pressure problem. Where multiple outlets are connected to the same restrictive pipework, using one outlet reduces the available flow to the others. This commonly occurs where older 15mm distribution pipework is expected to supply several modern outlets simultaneously.
Yes. Older plumbing systems were often designed around lower demand and tank-fed arrangements. Over time, systems are modified, bathrooms added, and hot water systems upgraded without the original pipework being redesigned. The result is often pipework that is no longer capable of delivering the required flow.
Yes. Traditional systems with cold water storage tanks supplied much of the property at relatively low demand rates. Combination boilers and unvented hot water systems rely directly on the incoming mains supply and internal distribution pipework. Where the original installation has not been upgraded accordingly, performance problems often follow.
Yes. Concealed leaks may continue for extended periods before visible damage becomes apparent, particularly beneath suspended floors or within concealed voids. In some cases, the first indication is reduced flow, pressure fluctuation, damp smells, or unexplained water usage
In many cases, yes. Shared supply arrangements remain common in older London housing stock, particularly where properties were originally built with shared incoming supplies or later subdivided. Separation typically involves installing dedicated supply pipework so each property operates independently.
Yes. Internal lead pipework is still regularly found within older London properties, particularly beneath floors, buried in plasterwork, and within sections of pipework that have never been upgraded. It is also common to find lead remaining where only partial alterations have been carried out over time.
In many cases, previous work has focused on isolated symptoms rather than overall system performance. Pipework may have been repeatedly extended, adapted, or repaired without addressing the underlying layout, restrictions, or condition of the system itself. As demand increases, the original problems often reappear
Yes. Many older London properties were originally designed around cold water storage tanks located in the loft space. As heating and hot water systems are upgraded, these arrangements are often altered or partially removed, leaving sections of redundant or poorly configured pipework behind. Where modifications have not been properly designed, this can contribute to low flow rates, poor distribution, and ongoing plumbing issues.
In many cases, yes. Internal plumbing problems are often caused by specific sections of restrictive, undersized, poorly routed, or deteriorated pipework rather than the entire installation. A detailed assessment can identify the areas that require modification or replacement, allowing targeted improvements to be carried out without unnecessary disruption or expense.
Articles covering lead in drinking water, public health, water regulations, and water company operations.
Abstract Lead contamination of drinking water from legacy plumbing remains a significant public-health concern globally. Although the use of…
Introduction: When Lead Exposure Shows Up at School Something important about lead exposure is that it rarely announces itself.…
Introduction For decades, Scotland’s history of violence has usually been explained through deprivation, alcohol, industrial decline, policing, family breakdown…
South London – Bromley – Croydon – Merton – Kingston – Sutton – Wandsworth – West London – Brent – Ealing – Hammersmith & Fulham – Harrow – Richmond – Hillingdon – Hounslow – East London – Barking & Dagenham – Lewisham – Greenwich – Hackney – Tower Hamlets – Newham – Bexley – Waltham Forest – North London – Barnet – Enfield– Haringey – Central London – Camden – City of London – Kensington & Chelsea – Islington – Lambeth – Southwark – Westminster – Surrey – Elmbridge – Epsom Guildford – Mole Valley – Reigate – Runnymede – Spelthorne – Surrey Heath – Tandridge – Waverley – Woking
To discuss your situation, arrange a visit, or request a callback from one of our team
Leave your details and we will call you back
Just fill out the form below or call free on 0800 037 1247, and one of our team will get back to you promptly to discuss your requirements.
