Many properties in Twickenham and across the TW1 postcode still have original lead water supply pipes — a legacy of the Edwardian construction era when lead was the standard material for domestic plumbing. Lead in drinking water poses a genuine health risk, particularly for children and pregnant women. Jay Plumbing Heating & Drains replaces lead supply pipes with modern copper or plastic pipework, eliminating the risk and bringing properties into compliance with current water quality standards.
Twickenham's housing stock is dominated by Edwardian properties built between approximately 1900 and 1914 — precisely the era when lead was the universal material for domestic water supply pipes. Unlike Victorian terraces that have often been more extensively modernised due to greater age, many Edwardian properties retain a higher proportion of original building fabric, including original plumbing.
Lead pipes in these properties take two primary forms. The lead communication pipe runs from the water main under the street to the boundary of the property — this section is owned and maintained by Thames Water. The lead supply pipe runs from the property boundary to the internal stopcock — this section is the homeowner's responsibility. In many Twickenham properties, both sections remain as original lead. Replacing only the internal section while the external section remains lead provides limited benefit, as lead can dissolve into standing water in either section.
Thames Water operates a lead pipe replacement programme in London, under which they will replace the communication pipe (their section) free of charge when a homeowner replaces the supply pipe (the homeowner's section). This means the total cost of replacing all lead pipework serving a property is often significantly lower than homeowners assume — the homeowner's cost covers only the internal section, while Thames Water covers the external section at no charge. We coordinate with Thames Water's programme on behalf of homeowners undertaking lead pipe replacement.
We cover Twickenham, Richmond, Whitton, St Margarets, Strawberry Hill, East Twickenham, Hampton, Teddington, Kingston upon Thames, Isleworth, Hounslow, Brentford, Kew and Feltham
Call 020 3519 7480 or email info@plumbers-twickenham.co.uk and we will talk through the job.
Lead pipe replacement begins with identifying all lead pipework in the property and the route of the supply pipe from the boundary to the internal stopcock. In most Twickenham Edwardian terraces, the supply pipe enters the property at the front, runs beneath the hall or front room floor, and connects to the internal stopcock under the kitchen sink. The route varies between properties, and identifying it accurately before work begins allows us to plan the most efficient and least disruptive replacement approach.
Where the supply pipe runs under a suspended timber floor, the pipe is typically accessed by lifting boards and running new pipework alongside the original route, minimising the number of boards that need to be lifted. Where the pipe runs under a solid concrete floor — more common in properties that have had ground floors replaced — open trenching or a new surface-run route alongside the original may be required. We discuss all options with homeowners before starting work and agree the approach that best balances cost, disruption and finish.
The replacement material is typically plastic (MDPE or CPVC) for the supply pipe run, which is the same material used by water companies for modern supply connections and is fully approved for potable water use. Copper is an alternative where preferred, though slightly higher in cost. Both materials are approved for mains pressure water supply and will last the lifetime of the property without corrosion.
The application to Thames Water for replacement of their section (the communication pipe) is submitted before or at the time of the internal replacement work. Thames Water typically takes four to six weeks to schedule their work following approval of the application. In the interim, the new internal pipe is connected to the existing lead communication pipe — a compliant temporary connection that allows the internal work to be completed and tested. Thames Water then completes their section, resulting in an entirely lead-free supply.
Not all Edwardian properties in Twickenham still have original lead supply pipes — some will have been replaced during kitchen or bathroom renovations, or as part of previous plumbing work. Identifying whether your property has lead supply pipes requires a physical inspection rather than any assumption based on age.
The easiest check is to look at the supply pipe where it connects to the internal stopcock (usually under the kitchen sink). Lead pipe is dull grey and relatively soft — you can scratch the surface with a coin to reveal the bright silver colour of the lead beneath. It is heavier than copper or plastic and has a characteristic slight wobble rather than the rigidity of copper. The pipe from the stopcock to the cold kitchen tap, and to the cold water storage tank if present, may also be original lead.
Water testing is an option for homeowners who want to confirm whether lead is dissolving into their water supply. A certified laboratory test of first-draw tap water (water that has been standing in the pipe overnight) will indicate whether lead levels exceed the regulatory limit. Thames Water also offers a lead testing service for properties in their supply area. However, a negative test result does not mean there is no lead pipe — it means the lead concentration in the sampled water was below the limit on the day of the test. Replacement of lead pipes eliminates the risk entirely rather than managing it through periodic testing.
The presence of lead pipes is also relevant for homeowners who are selling or letting their property. While there is no current legal requirement to replace lead pipes before selling, buyers and tenants are increasingly aware of the issue, and the presence of lead supply pipes can become a point of negotiation. Proactive replacement before listing a property removes this as an issue and, in Twickenham's competitive property market, demonstrates responsible maintenance of the building fabric.
We carry out lead pipe assessments as a standalone visit for homeowners who wish to understand the extent of lead pipework in their property before committing to replacement work. The assessment identifies all lead pipes, confirms the route of the supply pipe, advises on the replacement approach and cost, and explains the Thames Water coordination process. There is no obligation to proceed with replacement following an assessment.
Cost depends on the length and route of the supply pipe through the property and the access required (lifting floorboards, minor excavation, etc.). A typical Twickenham terraced house with a straightforward supply pipe route costs in the range of £600-£1,200 for the internal section, including materials and labour. Thames Water replaces their section (from the main to the boundary) free of charge when the homeowner replaces the internal section. We provide a fixed-price quote after a survey of the property.
Lead pipe replacement involves some disruption — typically lifting a number of floorboards in the hall or front room to access the pipe route. We aim to lift the minimum number of boards necessary, replace them carefully after the work, and leave the area tidy. In properties with solid floors, a short section of external trench alongside the house may be required for the boundary connection. We discuss the expected level of disruption with homeowners before starting and take care to minimise it wherever possible.
Yes, work on the supply pipe that connects to the water main is notifiable to Thames Water, and we manage this notification as part of the replacement project. The notification allows Thames Water to schedule replacement of their section (the communication pipe) free of charge. We submit the application on your behalf and liaise with Thames Water throughout the process. Their replacement work is typically carried out within four to eight weeks of the internal work being completed.
Some kitchen tap filters can reduce lead levels in drinking water, but performance varies significantly between products and depends on regular filter replacement to maintain effectiveness. A filter does not protect water used for cooking (which may come from an unfiltered tap) or water consumed at other taps in the property. Filters also do nothing to address lead leaching into water in the pipes throughout the rest of the property. Physical replacement of lead pipes is the only measure that eliminates the source of lead contamination rather than treating it after the fact.
Tenants can request that their landlord investigate and replace lead supply pipes. Landlords have a general obligation to maintain properties in a habitable condition, and the presence of lead in the water supply above regulatory limits would engage this obligation. If you are a landlord in Twickenham and are unsure whether your rental properties have lead supply pipes, call us to arrange an assessment — proactive management is both responsible and practically easier than responding to tenant complaints.